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The Best Marine Varnishes

Written by J. Harvey / Fact checked by S. Numbers

Let’s face it, we don’t give as much credit to the almost perfect combination of boats and varnishes. After all, vessels aren’t exactly cheap. They aren’t immune to deterioration as well. If there’s one solid way for you to preserve the life of your investment and even take her beauty up a notch, wouldn’t you seize it?

For my part, I can wholeheartedly say that these varnishes are great investments, especially if we’re talking about the best marine varnish. These concoctions go beyond their practical benefits, lending anything made of wood with a nice finish that only unlocks and magnifies their natural exquisiteness.

I can say as much for the products I’ve featured here. They have given me noteworthy, if not outstanding, results that make the others I’ve tried in my more than ten years of boating and fishing pale in comparison.

• Great finish
• Easy to use
• Great value for money

• Superb satin finish
• High gloss protection
• Very versatile varnish

• Easy to apply
• Excellent UV protection

Table of Contents

1. Rust-Oleum 207008 Marine Spar Varnish

2. totalboat gleam marine spar varnish, 3. epifanes cv.500 clear varnish, 4. mccloskey 7509 man o’war spar marine varnish, 5. totalboat 482869 lust marine varnish, 6. epifanes wfm.500 wood finish matte, 7. minwax 63200444 helmsman spar urethane, 8. interlux iva316/qt cetol natural teak varnish, 9. mccloskey 7505 man o’ war spar varnish, 10. pettit marine paint flagship varnish 2015, 11. system three 1855s16 marine spar varnish, 12. duralux m738-1 spar varnish, 13. old masters 153617 spar marine varnish, factors to consider when choosing marine varnish, what is the best marine varnish, what is the difference between spar varnish and marine barnish, how do you apply marine varnish to wood, how long will marine varnish last, is marine spar varnish waterproof, best marine varnish reviews.

If I’m going for all-around reliability and protection from sun and moisture damage, I’d choose this varnish in a heartbeat.

This is my go-to varnish for anything wood found in my sailboat. Whether it’s furniture or railing or sometimes even the bow, I often get the kind of maintainability I want every time I use this. The finish is no less attractive and only gets glittery over time in a number of my past applications.

Thinned up to around 30%, it dries quickly enough to apply multiple coats in a day. Sometimes I go for as low as 20%, down to even 5%. It’s because thinning too much does tend to backfire and lead to the varnish taking a long time to dry. It’s easy to use with everything considered.

If you want the best results, I’ve found that using a fresh foam brush with every coat would result in optimal smoothness. It may seem like a waste, buying multiple brushes, but the results are unrivaled, to say the least. I’ve had applications that lasted for a good 3 years before I needed to refinish them.

• Excellent UV and water protection
• More affordable but with high-end results
• Low shelf life

This varnish smoothly combines ease of use, beautiful finishes, and above-average durability. The winning formula for successful marine finishes for wood, in short.

This varnish is versatile in that it leaves plenty of routes open for you to take. For one, I like that they give you plenty of freedom when choosing the shine you want. It’s also available in different sizes, so I always get to buy only the proportions I deem fit for a specific project.

I have to be partial to the satin finish, though, since it delivers the exquisite luster I like to see in my indoor boat furniture and fixtures like railings. However, I always make sure to apply a high-gloss varnish if I’m working on anything that has to be exposed to the sun for long hours. That being said, I like that this product gives you both satin and gloss options.

I make sure to apply the high-gloss varnish as a topcoat, and I’ve gotten excellent results, mostly 1 to 2 years of unblemished finishes, with this practice. Sometimes, it’s shorter than that, especially on wooden areas that are more exposed to the elements. Yet, it’s protection you normally expect and can get from high-gloss varnish. In addition, it’s a varnish that’s also noticeably on the thin side, so I kind of get that it wears away faster than thicker varieties.

• Uncomplicated to apply
• Has multiple sheen and size options
• Not as durable as others

Another safe option, Epifanes marine spar varnish is anything but average with its status as a crowd favorite. Expect superior finish and durability if you choose this.

This varnish easily earns a spot here, considering its unchanging and undeniably positive reputation among boaters. Simply put, it’s hard to fault because of the wonderful results it can bring. The shiny, attractive gloss that has the Epifanes trademark is rarely surpassed by other marine-grade varnishes in my opinion.

What’s equally neat is that it’s not difficult to apply. You don’t really need to sand it with every coat, unlike the majority of other brands out there, but I still suggest you do it, especially in the later coatings. I recommend using marine spirits as a thinner with a 2:1 ratio, and take the time to pour it through a strainer to guarantee a smooth finish. At best, you’ll have to set 5 to 7 days of gradual coating to get the kind of attractive finish you want; and I mean capital-A attractive.

As in other great exterior varnishes, this product is an example to follow when imparting UV protection. At least, that’s what I think is primarily responsible for the excellent finish and the overall durability. I use this as much on my sailboat’s wood portions above the waterline and furniture as well as furnishings in my home, and the finish often lasts for 2 years on average.

• Amazing shine and finish
• Takes a while to dry
• Short shelf life

McCloskey’s Man O’War spar varnish is durable, to an almost no-brainer degree. It’s what I buy if I want to get the best out of what spar varnish offers to the average boater.

Despite its relatively hard finish, spar varnish tends to wear out faster than urethane. It’s a natural thing, so I won’t bother to list it as a con. You can’t mimic the deep amber tint, caramelization, and versatility of good old spar varnish, and this brand delivers no less than that trio of perks.

If I’m going to name a worthy brand representative of spar varnishes, I’d promptly pick this one. It adheres excellently to any kind of wood, so I generously slather any wooden fixture in my boat with this once I get a hold of a bottle.

While it’s easy to use, you’d better be prepared to invest time working with this varnish. I use mineral spirits for thinning, and I make sure to apply thin coats, starting from the middle, using a mini roller and a brush, mohair and ox hair respectively. I sand in between coats, and overall it takes time since it dries slowly.

The durability stems a lot from the outstanding UV protection. My sailboat’s wooden bow that has this finish has been battered by rain a good number of times already, and it’s still holding up after a year since the initial application. Since it’s effortless to apply, I just sand and recoat every once in a while.

• Outstanding UV protection
• Adheres to most types of wood
• Classic, eye-catching spar varnish finish
• Slow-drying
• Limited availability

TotalBoat is a household name in the marine industry as far as paints and varnishes go. This is the brand’s best offering if we’re going to consider fundamental factors like durability, shine, and value for money.

I need to stress outright that this varnish is extra thick, almost honey-like. If you don’t thin it out to at least 50%, you’ll only end up grappling with it to less than desirable results. It’s not exactly beginner-friendly with that considered, but it does pay off since you get optimal protection and the kind of shine any boat owner would be proud of.

Speaking of the finish, it begins to shine through once you hit the one-year mark. At least, that’s what I get from most of the vessels and furniture I apply it to. I can say that it’s smooth sailing once you take the time to know the right consistency.

I often use a roller and apply 5 coats then do a recoat after 2 hours in a whole day. Ideally, the last two coats should only be thinned by about 10% only. It might get tricky applying it then but, trust me, you’ll get the hang of it.

I get the results I want within a day or two — or more at times during less than optimal humidities and temperatures. Even so, that’s obviously quicker than handling traditional varnish, which takes weeks to settle. I do acknowledge the thinner’s role in helping with the drying time.

• Excellent shine and finish
• Proven durability
• Becomes easy to use with practice
• Quick-drying

If we’re talking about top-of-the-line, marine-grade durability, this one deserves to be called the best marine wood finish.

This is my favorite to use on teak because of its proven waterproof capabilities and the fact that its satin finish has just the right amount of sheen, for me, at least. It brings out the beauty of the teak and almost any wood I apply it to, for that matter, and this is coming from someone who has tried numerous marine-grade varnish before. I’ve had furniture that managed to maintain its finish for an impressive 5 years with the help of this varnish.

It’s a bit of a challenge to apply. It actually flows well enough as it is, and I rarely have to thin it with every application. However, you have to make sure that you apply it evenly with every coat and oftentimes as quickly as possible. Once I get patchy and bubbly results, that’s the only time I thin it, and I sand after the first coat, totaling up to 3 coats on average. It will dry more slowly if I thin it, though.

• Excellent durability
• Nice satin finish
• Flows smoothly without thinning
• Brings out the beauty of the wood extremely well
• Fairly cost-effective
• Not beginner-friendly

Though not marine-grade, Minwax has proven to be just as durable as many products with that label. It’s very easy to use and delivers just the right amount of shine.

I often use this on my sailboat’s furniture, and if left with no other options, even the wooden exterior of the hull and bow. It goes well with canoes, but I only tend to apply it on the ribs, rudder, and planking. While not marine-grade, it’s great for outdoor furniture, and, to me, that’s always a good sign of heavy-duty UV protection.

If I want to reinforce the protection, I only need to apply more layers, 4 coats at most but not less than 2. I’ve only used it on oak-made fixtures, though, and I get the longevity and finish I want with that kind of simple setup. The varnish lasts up to 1 to 2 years before recoating becomes necessary, with minor peeling only appearing after a year based on my experience.

I like that they give you plenty of options with regards to sheen and container sizes. I prefer satin for my interior furniture. I once made the mistake of not mixing it well and got a result that’s almost similar to high gloss. To avoid this, you need to make sure you mix it for a good 5 minutes and scrape the sides and bottoms of the can as you do so. This guarantees the soft shine you’re aiming for.

• Plenty of sheen and size options
• Decent durability
• Dries quickly
• Not exactly marine-grade

This varnish earns my thumbs up with the kind of inimitable finish it can deliver and its relatively easy application.

This has since become my favorite varnish on teak fixtures when I tried it out 2 years ago. This is because of the immense difference it makes in the way it lends my pulpit or anything made of teak with a sophisticated, good-as-new finish. It’s not overly glossy, which I attribute to the “natural teak” claim, and only darkens the wood a tad so it will still maintain its natural hues.

I’m glad it didn’t cause any yellowing, and after my second application, I can still say the same. It has a runny consistency that merits forgoing thinning on the first coat. I like to use a brush when applying it to have better control over coverage, which is great enough as it is, and all I can say is that I’ll apply this to my boat’s bow and rails the moment they start showing signs of wear.

Nonetheless, it would be pushing it to say that it’s as durable as the other varnishes here. It only took a year before my bow showed signs of peels and cracks. However, after I applied a single maintenance coat on the entire thing, I found that it limited or delayed the damage since I’ve yet to see signs again after doing a recoating. That being said, I suggest applying a fresh layer at least once a year to make the most out of this marine varnish for boats.

• Outstanding finish
• No sanding and thinning required in most cases
• Good coverage
• Minimal darkening
• Well worth the money
• A bit pricey
• Not durable

Budget-friendly, reliable, and just as good as other solid brands, this McCluskey varnish is a must for anyone choosing to go for value for money all the way.

The fact that this varnish can give you outstanding satin finishes and superb durability without going overboard in cost should give you a ready hint why a lot of boaters are shifting to this product. When I say superb durability, I mean thick coatings that you’ll be confident will last for years.

In my case, the minimum is 3 years on all my wood projects, boat bows, railings, and furniture included. You may start seeing peels and scratches here and there, as evidenced by the 7-year-old canoe that I refurbished 3 years ago. But, to me, it’s still none the worse for wear and nothing a minor recoating job won’t remedy.

The finish is not unlike the ones I get from the other varnishes mentioned here. It accentuates the natural color and look of the wood, and I’m saying this for redwood, teak, and light oak, which are the types I’ve applied it to. It dries in a day like most spar varnishes and typically doesn’t need to be thinned, though sanding is ideal per coat.

Incidentally, I need to underline the fact that this varnish is one of the few that doesn’t skin over in the can after you’ve stored what’s left of it. At least, that’s what I can say for most of the cans I’ve purchased and stored, with about a third of the can full in a year.

• Works well for most types of wood
• Superior durability
• Doesn’t skin like other varnishes
• More reasonably priced than other brands

This rarely figures in marine varnish review posts, and that’s unfortunate considering it’s another top-quality marine varnish that doesn’t yellow, imparts a glossy and thick appearance, and superb UV protection.

Usually, I use this as a general-purpose varnish for the teak and cedar parts and fixtures of my one and only yacht. It gives a deep-colored, thick, glossy, grainy, and smooth finish that I can’t get enough of. It doesn’t yellow at all, probably because of the UV additive used, at least, partly. Anyway, this is one positive quality I always like from any alkyd varnish that is done right.

I prefer to spray this one, following the 20% thinning guideline. Spraying shortens the time for full coverage. I sand lightly between coats using 220-grit sandpaper, and by and large, I only need 3 to 4 coats to get the beautiful finish I described above. It takes almost a whole day to dry, but I don’t mind since I get quality results.

As for durability, I can safely say it’s UV stable. I often leave a couple of chairs and tables out on the deck if the weather’s great, oftentimes, for an entire day. Besides a few scratches in some parts, which aren’t UV-related, they haven’t peeled yet and have maintained their shininess after 2 years since application. I can say the same for the yacht’s teak pulpit.

• Doesn’t yellow
• Superb UV protection
• Proven gloss retention

To me, this is the best boat varnish if we’re only considering durability. It also earns a ready checkmark in protection and attractive finish, making it nothing short of tough to beat.

As far as durability is concerned, the longest that I’ve seen this last without undergoing any kind of major peeling or cracking is close to 3 and a half years. It was on my favorite canoe, which I use fairly regularly for freshwater fishing. 3 years is the maximum for any exterior wood varnish for me, and without a doubt, many boaters would say the same.

I attribute most of the longevity to the excellent water and UV protection. My canoe has borne the brunt of rain and water splashes over the years. I can say the same when I expose it to extensive sunlight exposure when I go fishing in Lake Erie. Top-tier durability in my book.

I sometimes use a thinner with this varnish, but I’ve found that you don’t really need to thin it if you use an HVLP spray gun. Sure, it takes a while to dry and you have to be extra careful, but I’ll take that any day if I get to enjoy these perks and results consistently.

• Outstanding durability
• Relatively attractive finish
• Easy to apply with a sprayer
• Comes in gloss and satin varieties
• Dries slowly without a thinner

A true gem of a find, Duralux exceeded my expectations with its durability and versatility.

In almost any kind of marine varnish for exterior doors, durability and protection immediately go well together. This spar varnish proves it doesn’t belong on the back burner by delivering both. One of my canoes that I applied this on is still going strong for more than a year, and that’s a quality not a lot of products can boast of.

I’ve had varnish that didn’t take more than a month to start peeling and cracking. That’s after a fresh application, mind you, and, yes, I follow brand recommendations to a tee if I haven’t discovered a better way to apply it. This varnish has kept my other canoes shiny every time so I deemed it deserves the spotlight.

Moreover, it doesn’t yellow over time, unlike some clear varnish I’ve used before. You may argue that there’s a lot of variables when it comes to varnish yellowing, like sanding and possible chemicals it can react to. I’m not sure whether this is spar polyurethane, but I’m betting it is since that’s the only type of varnish I’ve used that doesn’t give me the yellowing effect even with minimal to no sanding.

• Satisfactory finish
• Uncomplicated application
• Doesn’t yellow over time
• Doesn’t dry quickly

Old Masters’s varnish shouldn’t be overlooked for its conveniences and quality that only a few top-tier varnish brands can bravely claim they can deliver every time.

This is among the lesser-known spar varnishes that don’t yellow even after a long time has passed. The canoe that I refurbished 3 years ago would prove as much, as it’s still holding up well, surprisingly if I might add. To be honest, this was a second option when I bought it as I didn’t have TotalBoat and McCluskey varnishes available back when I did the finishing job.

I was pleasantly surprised by how things turned out. I followed the instructions and stirred it well. It’s just the right kind of thick, to the point that I don’t have to thin it when applying with a brush or roller. I do have to thoroughly sand and clean the surface first, and it evens out nicely with every coating.

It dries quickly enough for me to apply a second coat in a single day, making me think it’s an exception among oil-based spar varnishes. At best, I give an allowance of 8 to 10 hours before brushing the next coat. Obviously, that’s a time-saving perk I’ll take any day.

It doesn’t produce a yellowing effect, even when applied to parts of my canoe that are regularly exposed to heat, sunlight, and the elements. That’s noteworthy considering it’s a clear varnish. I even have to say that the slightly weathered look it has gotten lends it a charm that most boaters would appreciate.

• Easy application
• Decent durability and finish
• Doesn’t yellow with age
• Limited to small pint-sized cans

Based on my experience, there are many “safe” marine varnish options out there. This only means you’re likely to not run out of beginner-friendly brands and can guarantee high-quality results at the same time. Whether it’s high-gloss or satin, all spar varnishes are easy to apply over new wood or previously coated surfaces. Marine varnish is also not partial to any type of wood and can accommodate those commonly found aboard or form part of a vessel, like teak, redwood, oak, etc.

However, that doesn’t completely discount the need to pay attention to certain factors when making your decision. These are usually the ones I make a note of when planning to start a varnishing job.

• Durability – I’ve found that marine-grade polyurethane is hard to equal when it comes to finishes that are guaranteed to last. Most spar varnishes pale in comparison to their urethane counterparts in this regard because polyurethane tends to last for a minimum of 3 years before re-coats are needed, based on my experience. This is why they’re great options as a marine varnish for outdoor furniture.

For spar varnishes, I’ve had finishes that only lasted a year or even less. At best, these two offer equally potent UV protection, waterproof benefits, and even resistance to scratching.

• Drying Time – Are you working with a severely limited timeframe and need to complete coats within a day? You may want to consider varnishes that dry faster like water-based spar urethane since these can dry in only a few hours. Most spar varnishes require a whole day of waiting to apply coats, assuming climate conditions are optimal.
• Ease of Use – To ensure you won’t end up throwing away your money, don’t ignore how easy or hard a specific varnish is typically applied.
• Shelf Life – It won’t hurt to pay attention to how long a specific can of varnish will last while in storage.
• Gloss – This is admittedly a largely subjective factor, but if you’re opting for high-gloss varnish, it’s almost always the one with the best durability. However, do you like your wood to be extra shiny? There are semi-gloss and satin finishes that are just as attractive, if not more, especially when used on anything wood that is below deck.

We also need to discuss the possibility of a varnish yellowing or darkening the wood that it is applied to. Sometimes, the darkening could be due to the UV additive or tint used; thus, making it unavoidable unless you opt for a different varnish brand altogether.

As for yellowing, there are ways to avoid it. I shall discuss it below, but sometimes, it’s due to the actual product as well, especially if they are clear, alkyd, or oil-based. It’s not an absolute thing, though, and there are products that prove to be exceptions to this rule.

You’ll hear a lot of experienced boaters recommending brands like Epifanes, TotalBoat, McCloskey, and Rust-Oleum. I agree with them because, to me, these brands can easily meet the standards of high-quality marine varnish. Each one has qualities where they serve to shine better, and the reviews I outlined above should give you a good idea about what they are.

Nonetheless, I’m not completely discounting the other brands I included here. I daresay that they’re just as good as those top-dog brands, especially in essential factors like durability and a long-lasting aesthetically appealing finish. Moreover, I find them to be valuable substitutes if any go-to brand happens to be unavailable and won’t even hesitate to pick them as the main option based on certain requirements of a finishing job.

Incidentally, you may have noticed that I didn’t include ease of cleaning when discussing these brands. That’s because most, if not all, of them are very easy to clean for me. At least, for the almost uniform smooth finishes that I get out of them.

There’s not much, really. When boaters use the term “spar varnish”, chances are, they’re also automatically referring to marine varnish. You can also see this in how brands usually label their products in online stores, like Sherwin Williams marine spar varnish or TotalBoat gleam marine spar varnish, to cite a few examples. If you’re using spar varnish, it’s almost always marine-grade.

Both terms give the ready connotation of finishes that provide heavy-duty protection against the harsh elements usually involved when boating, fishing, and cruising. You’ll find plenty of oil-based spar varnishes (i.e. tung oil, alkyd resin, etc.) that are imbued with additives that serve to accentuate the natural beauty of the wood, as well as solvents and other chemicals that promote fast drying and add UV protection.

Since certain varnishes have different components or are more natural or synthetic, it’s best to stick to the manufacturer’s instructions when applying any kind of varnish. However, we can’t deny that most projects share a few essential guidelines, such as the following:

• Preparation usually entails sanding between coats. The most ideal to use for this purpose is 180 to 220-grit sandpaper or even a Scotchbrite pad will do sometimes. Take note that some varnish products can do without sanding, especially for the initial coat. But, this would still depend on whether you’re applying it to a bare wooden surface or if it’s been previously coated before. If it’s the latter, then you’d most likely need to sand it first.
• Clean the dust that forms after sanding using a clean rag. I wipe it down further with a tack rag to ensure no dust or debris would still be present the moment I start applying coats.
• As for temperature and humidity, it’s best to apply any kind of marine varnish if the temperatures during the entire day don’t go above 80 degrees Fahrenheit. Humidity should be 50 to 60% or even slightly lower than that. I found that the smartest route to take is to be patient and wait for the right climate before going ahead with a project, especially if you know that it will take a number of days to finish.
• Thinning depends a lot on the product. If it’s too thick, it’s often necessary to do this, even if the brand doesn’t mention it in the instructions. The safest route for this is to follow a 2:1 varnish to thinner ratio. Mineral spirits are recommended.
• I also recommend taking the time to strain the varnish using a paint strainer to ensure a smooth finish. Sometimes, this can make all the difference in the world in getting the kind of finish that any boater would be proud of.
• As for applying coats, there are certain products that require you to start from the middle so that you can ensure an even coating. Others would caution about wiping too much, while many suggest, as is often the case in spar oil-based urethane, to make thin coats for every layer.
• Bristle brushes and badger-hair brushes are often the standard tool for application. But, again, there are products that are easier to apply with a spray or roller.

Most marine varnishes typically last for at least 2 years. There are brands that have a minimum of 3 years before they begin showing signs of damage. I can attest to marine varnish that keeps its shine and protection for 5 years, and I’ve highlighted the exact products that can achieve that.

Ultimately, if you keep its sun exposure to a minimum, you’re guaranteed to extend any kind of varnish’s lifespan. I’ve noticed that varnished fixtures and furniture in my yacht tend to last significantly longer than the ones that are exposed to sunlight extensively, regardless of the varnish’s UV-protective capabilities.

This is almost always the case considering this type of varnish is marine-grade. Most experts attribute this to spar varnish’s flexibility (i.e. its ability to expand and contract with the wood). However, equally many attribute it to the simple fact that spar varnish is mainly oil-based, allowing to wick away moisture with ease.

Now, do you have a good idea of what the best marine varnish brings to the table? With all things considered, the best parting advice I can give is to not hesitate to try out the options available to you. Sure, there will always be no-brainer choices, but it didn’t take long for me to find out that it pays to try out other brands because they may give your boat the kind of shine or longevity you’ve always wanted.

“I am James Harvey – founder of Boating Basics Online. It is established with the drive to help out first-time boaters, which are those desiring to explore their way through the water. So if you are new to boating, start from here with me. “

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Choosing The Right Varnish

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Don't know a resin from a polyurethane? Read on to learn how to decipher that can.

This small boat is finished with Awlwood giving a crystal clear surface that shows off hte wood grain.

There are lots of different makes of varnish available, and you'd think that you could just walk into your nearest store and pick almost any can, right? Not so fast! There's more to choosing the right varnish than it might appear — choose the wrong sort and you could be left with an expensive mess.

Basically, there are three kinds of varnish: Oil based, usually made with tung oil as one of the main ingredients; polyurethanes, which generally have a synthetic-oil base; and two-part varnishes, which, as the name implies, is a resin base to which a hardener, or catalyst is added prior to application. Unless you're starting off from bare wood, the most sensible way is to use the same finish that was applied last time. The varnish will be compatible with what's on the boat already, and the color will be consistent. When varnishing bare wood, almost any varnish can be used, but read the instructions on the can carefully before starting.

Tung-Oil Varnishes

Old-time varnishes were boiled down from tree resin. Older-style varnishes tend to be thicker and may be made from a combination of tung oil, phenolic resins, and alkyds. Most of these varnishes were developed for furniture and only later used for boat masts. Given that a mast flexes in the wind, the varnish needs to move with it rather than crack. This gave rise to single-part, tung-oil-based varnish often referred to as "spar" varnish. With these, the varnish is dissolved in solvents, so it begins to harden as soon as it's applied. You can apply a second coat of tung-oil varnish before the first layer is totally hardened because the solvents will keep evaporating out of the underlying varnish layer. Jim Seidel, who retired as marketing manager of Interlux, says, "You need to be careful when applying tung-oil varnish on horizontal surfaces as you can lay it on too heavily and it feels dry, but depending on the thickness of the coating and temperature you're working in, it may trap solvent and can lead to alligatoring." These varnishes tend to give a slight yellow cast to the wood.

Polyurethanes

Oil-based one-part polyurethanes are made using chemicals similar to epoxy and can be used to cover clear epoxy resin. In fact, one way to build up layers fast is to coat the wood with epoxy and finish with three or four coats of high-UV polyurethane. Polyurethanes can be oil- or water-based. Oil-based polyurethanes tend to be harder, and last slightly longer, but they can also crack. When applying oil-based polyurethanes, you need to let one layer harden completely, then sand it lightly, before applying a second coat. Oil-based polyurethanes tend to give a slight yellow color to the wood.

Water-based polyurethanes are easier to clean up, but they're slightly softer and don't last quite as long as oil-based. Again the varnish needs to harden before applying a second coat. Water-based varnishes can be almost totally clear.

Two-Part Varnishes

Two-part varnishes need to be mixed before they're used. In most cases, the base and the hardener are in separate cans, and you simply pour the contents of one can into the other and stir well. The advantage of two-part polyurethane varnishes is that they last longer and are far more abrasion resistant. It is important to note that due to the very hard nature of the coating, a two-part varnish can't be applied over a one-part varnish, as they're incompatible with each other. The problem with two-part varnishes is that they only have several hours in which they stay liquid. (The "pot life" that the varnish stays useable can be from several hours up to two days.) Once the varnish is spread out on the job, it will begin to harden as air and moisture in the air act on it. These varnishes tend to be clear and need to be thoroughly dry before a second coat is applied. Steve Schultz, formerly with Interlux and now with EMC Quantum, says, "Two-part varnishes are a better choice because they last longer and reduce the labor required. In turn, this reduces the overall cost of varnish maintenance."

Two-part varnishes contain isocyanates, and while many are meant to be applied by a professional (with safety precautions) they can be brushed on provided the user wears a respirator. Isocyanates become a problem when they're sprayed because the fine particle size can affect the user's lungs. Brushing them, provided the user observes standard safety precautions (gloves, eye protection, and respirator), is preferable.

Commonly Available Varnishes

Single-part varnishes and coatings.

Awlgrip AwlSpar (for professional use only)

Bristol Finish Traditional Amber Urethane (exterior), Classic Clear Water Based Urethane (Interior only)

Detco Crystal Varnish (clear coat)

Epifanes Clear Varnish (Tung oil/Alkyd/max UV resistant), Rapid Coat (Alkyd/Urethane), Woodfinish (tung oil/urethane)

HMG Marine Coma Berenice (polyurethane/Alkyd)

Interlux Compass Clear (polyurethane), Schooner Gold (high build, high performance), Schooner (polyurethane), Goldspar Satin (modified polyurethane)

Le Tonkinois (Tung oil/linseed oil)

Minwax Helmsman Spar Urethane, Water based Spar Urethane 

Pettit Z Spar (linseed/Tung oil), Z Spar Flagship (linseed/Tung oil), Captain's Varnish (alkyd/phenolic/Tung/Linseed oil), Hi build (tung oil/phenolic/linseed oil), EasyPoxy (urethane)

PermaJet PermaPROtect GLO, SAT (water based polymer)

Signature Finish Clear Urethane

West Marine Brand Admiral's Varnish (alkyd), Five Star Premium (alkyd), WoodShield (synthetic wood finish)

Awlgrip AwlBrite Clear (for professional use only)

Alexseal Clear (for professional use only)

EMC Quantum UV Varnish

Interlux Perfection Plus (Clear polyurethane)

Signature Finish Honey Teak (Urethane Enamel top coat)

Pigmented Oil-Based Coatings

Owatrol Marine Deks Ole

Minwax Teak Oil

Sikkens ProLuxe Cetol Marine

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Captain Curran's sailing blog

~ a collection of sailing adventures from Alaska to Cabo

July 14, 2016

To varnish or not to varnish short answer...don't varnish., below i will review the process of applying cetol..

• Cetol is easier to apply than varnish (put on 3-4 coats, no work in between coats)
• It's easier to remove than varnish
• It lasts 2-3 years before you need to re-touch (varnish lasts 6-12 months)
• in general, varnish has a deeper and richer look vs. cetol
• some people complain about the slightly orange color in cetol

Final pictures after 4 coats of sikkens cetol marine natural teak

Cetol Marine Natural Teak Reviews

25 comments:.

Thanks for your advice here! I'm wondering how Cetol works with mahogany - which is primarily what I have. Fair winds, Kelly

@Kelly, Cetol works fine on Mahogany, its not specific to teak. Best of luck with the endeavor - Kevin

What a great result! Personally, I don't mind the slightly orange tint :/ the final result. Thanks for putting up this post, I've been trying to decide how best to give new life to my exterior woodwork and now I think I know how to proceed. Mike www.FillingTheSails.com

Mike, Glad it was helpful. Best of luck with the woodwork -

Nice job, Kevin. She looks great. I use a combination of Cetol and varnish - I finish a couple areas bright with varnish & the easy-to-maintain areas, and do the rest with Cetol (hand rails, eyebrows, etc.). I find that the varnish is easy this way. 2x year refresh the surface with two coats, gentle sanding/scuffing for prep, and that takes care if it. But if you let it get away from you, then it's more labor by far.

Rick Bailey Interesting - I've never tried that - but it makes sense.. Does the transition from cetol to various varnish look okay?

It doesn't bother me.

Rick, Good to know - I may try that in the future. Kevin

Hi All, My wife's boat has a wood mast. We first used Schooner which had the expected result of normal varnishing. Since pulling the mast often is a pain, the next go around we used Awlspar (multi coat a day, fast build up! A dream to apply!!). We applied 14 coats with no sanding between coats, as long as we did not go longer than 24 hrs between coats. Then we sand smooth. Lastly we put on 3 coats of Cetol clear gloss and it's done great. Now 3 years later, we'll sand and top off with another Cetol clear coat. We're at 36° North.

That's great to hear Jim B - I have heard that Cetol makes for a nice final finish. Yeah, the trick it to keep up with it - then you're never sanding down to the base.

Kevin Curran, When you look at Cetol and varnish side by side, vanish is shinier. That is the only drawback. I don't see Bahamian varnish crews using it on Trumpy's and Newport jewels. But if I look at Cetol alone, it looks great.

Capt C- I use Starbrite Teak Sealer on my Teak Patio set (huge 12 pc set). 2 coats typically lasts 12-18 months. When it wears down I just scrub it clean with a bristle brush and SB Teak Cleaner (gel formula), then re-apply the sealer. This works well and I DONT have to sand/sandblast/powerwash the whole set. When the Sikkens wears down, do you have to sand it off or just use a brush and cleaner? Again, I'd rather scrub and re-apply sealer more frequently (12-18mo) than have to sand once every 3-4 years. Thanks and Fair Winds!

Hello Eddie W, Yes, you are right... it is all about upkeep. Basically, the same maintenance you are practicing on your patio furniture will serve you well on the boat. Every 12-18 months you should do a touch-up. With the cetol, you do not need to sand again, as long as you don't let it go beyond 18 months. You just clean it up with a sponge or cloth - get the dust off - maybe a light brush - and then add on another coat of cetol, or you can add on a coat of a sealer. Come to think of it...it is time for me to do exactly that! Kevin

Awesome post

If you didn’t use the gloss coat to finish the natural gives you nonUV protection

Hi Jeremy, I'm not sure that's correct. I just checked out the specs on their website. They definitely include UV protecting elements in the natural teak cetol. From the interlux site for this product: Cetol Marine Natural Teak With Next Wave UV-absorbing technology, it offers incredible protection from damaging UV rays. It’s durable, translucent and creates a rich golden color finish on interior and exterior woods above the waterline. Specialty resins and advanced UV absorbers that provide greater protection, durability and longevity

Hi Cap'n, I use Cetol exclusively on the exposed timber on my converted trawler, on the Queensland Coast (15-23S is my cruising range). At these latitudes, varnish is strictly for masochists. My exterior Cetol is pretty ordinary after 3 years, (yair, I'm lazy, but I have cruised 1600nM in that time), but the interior stuff just needs a rub with 240 and a couple of new coats. All feature timber is PNG Kwila or Teak. A question- I have heard of a hardener for Cetol. All my tables and benchtops are Cetolled and it has very poor resistance to Overproof Bourbon and Gin, the two chemicals most likely to be spilt at my tables. Anyone who "knows" about the hardener won't share their info. Just wondering if you have heard anything. Regards, Cap'n Greg.

Cap'n Greg, I feel your pain. Bourbon and gin are no strangers to my cabin either....Yes, it is true, a cetol final coat would benefit from a good hardener. That would probably extend the time between the next cetol treatment also... Alas, I have no recommendations on a good product. I am not being coy either, I would share this if I knew... I don't use the cetol down below, so it's never been an issue. If any other readers have a suggestion for Greg, please share. Kevin

Cap'n Curran, Your cetol'd teak is great - you've sold me on that. But would you put it on decks? I've experienced significant discomfort on oiled teak decks - they get HOT - as opposed to natural feathered decks which are cool under bare feet. How long can one expect untreated teak decks to last before needing work/replacement? Thanks, BC

This is really helpful. I just started sailing (recently retired) and bought an old Catalina 25. I want to clean it up and make it look good but I don’t want to spend my remaining life doing that. You helped me decide Cetol is the right answer for me. Thanks!!

Hi BC, I've never had a problem on cetol decks barefoot.... always been comfortable, but I live in San Diego, so it's not too hot here. I put on two new coats about once a year... maybe once every two years if it looks pretty good. Capn Curran

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Practical Boat Owner

• Digital edition

Best boat varnish: 7 top options for gleaming woodwork

• Drew Maglio
• October 13, 2022

Different varnishes do different jobs. Understanding their properties will help you decide what's the best boat varnish for your woodwork. Drew Maglio explains all...

Few things are as quintessential to the archetypal sailboat as gleaming, iridescent woodwork that is indicative of a recent coat with one of the best boat varnish products on the market.

Choosing a product and methodology to apply marine varnish to achieve such results is not as simple as it would seem at first glance however, and this guide aims to make the whole process easier for novice and seasoned boat-owners alike.

First things first, what exactly is boat varnish? Put simply, varnish is a chemical solution of three parts which includes a penetrating oil, resin, and solvent.

Boat varnish for exterior use, aka. “spar varnish” — aptly named because it was designed and envisioned as a flexible protective coating to protect a yacht’s wooden spar in the harsh (outdoor) marine environment — both protects and beautifies a vessel’s wood parts.

It does so by sealing the wood with a somewhat hard, yet flexible, clear protective barrier that can last up to three years of UV and element exposure in temperate climates for the most durable two-part product formulations.

These days, most high-end boat varnishes use tung oil and an alkyld or polyurethane resin. Of the two types of resin, polyurethane — either one or two part — is going to be much more durable and resistant to UV, abrasion, fuel/solvent spills, and impacts.

While a two-part product cannot be applied over a one-part product, a two-part product is going to last much longer and be far more durable. Hence for high traffic areas like cabin soles, a two-part polyurethane product cannot be beat for longevity and durability.

Boaters should be aware that the most onerous task of applying boat varnish is the surface prep, which requires removing all flaking previous coatings by sanding, washing with solvent to degrease the surface, in addition to taping nearby areas to keep the varnish off.

Because of that, I highly recommend using quality products over cheaper, lower cost options which will mean your boat needs revarnishing far more often.

International Perfection Plus two-part varnish

Best polyurethane boat varnish

International Perfection Plus is a well-known two-pot polyurethane

International Perfection Plus (sold in the US under the Interlux brnad) is arguably the best overall marine spar varnish on the market. This two-part polyurethane formulation is not only the most aesthetically spectacular, but also the most durable and longest lasting when exposed to UV.

This two-part product is applied to bare wood after careful sanding and degreasing and can be rolled/brushed or sprayed. It uses a proprietary Interlux thinner and one’s results will be excellent if one follows the recommended procedures to the “t.”

Of all the boat varnish products on this list, this two-part product is probably the least DIY-friendly.

Reasons to buy

• Most durable marine varnish in terms of hardness and flexibility • Best UV resistance • Most beautiful (glossy) varnish if applied properly • Hardness and longevity makes it a prime contender to redo cabin soles and floor boards (after proper surface prep)

Reasons to avoid

• Difficult application for inexperienced laymen • Expensive

Buy International Perfection PLUS two-part varnish on Amazon (UK)

Buy International Perfection PLUS two-part Varnish on Gael Force Marine

Buy Interlux Perfection PLUS two-part varnish on Amazon (US)

Buy Interlux Perfection PLUS two-part varnish on West Marine

Note: We may earn a commission when you buy through links on our site, at no extra cost to you. This doesn’t affect our editorial independence.

Epifanes clear varnish.

Epifanes Clear Varnish includes tung oil and alkyd

Epifanes offers quality marine paints and varnishes at reasonable prices and their Clear High Gloss Varnish is no exception. With 64% solids content (tung oil) and an alkyd base, this varnish is sure to be brilliant in terms of gloss with reasonable durability and longevity.

With one-part alkyd products, boat owners can expect up to two years of protection before maintenance is required if left out in the elements year-round. This product can be brushed, rolled, or sprayed.

• Affordable, quality one-part product • High solids content results in very glossy finish • Relatively easy to apply and achieve satisfactory results

• Not as much UV protection as other offerings • Not as impact or abrasion-resistant as other offerings

Buy Epifanes Clear Varnish on Amazon

Buy Epifanes Clear Varnish on West Marine

International Paints are also sold in the US under the Interlux brand

International Schooner Premish Varnish

A traditional marine spar varnish — albeit a good one — is Interlux’s Schooner Varnish.

With an alkyd base, 47% of tung oil solids, and UV inhibitors to boot, this product is a well-balanced one-part product that is suitable for a variety of uses. This product can be brushed, rolled, or sprayed.

• Affordable, quality one-part product • Well-balanced product in terms of UV protection and solids content • Relatively easy to apply and achieve satisfactory results

• More expensive than Epifanes • Not as impact or abrasion-resistant as some other offerings • Not as much UV protection as some other offerings

Buy International Schooner Varnish on Amazon (UK)

Buy International Schooner Varnish on Gael Force Marine

Buy Interlux Schooner Varnish on West Marine

Total Boat Lust High Gloss Marine Varnish

Best value boat varnish

In recent years, Total Boat has become very popular offering products comparable—and sometimes superior—to the “big three” of Interlux, Petit, and Epifanes, at a fraction of the cost and their “Lust High Gloss Marine Varnish” is no exception. This one-part formulation uses linseed oil and a modified polyurethane base.

• Very affordable one-part proper “marine” varnish • Does not require sanding • Comes in matte for those seeking a satin finish • One-hour re-coat time

• Tends to cure quicker than most varnishes and therefore can cure before properly “flowing out” • Requires 6-8 coats

Buy Total Boat Lust High Gloss Marine Varnish on Amazon (US)

Buy Total Boat Lust High Gloss Marine Varnish on Walmart

Cetol Marine Wood Finish

Best boat varnish for external teak

Cetol has been making alternative wood finishes for a long time. While this product does not have the aesthetic beauty of freshly applied gleaming varnish, it lasts far longer and stands up to UV better than every one-part varnish on this list.

When I had peeling varnish on my 1987 Ericson 38-200 sailboat moored in the tropical Florida Keys, I elected to use Cetol’s “Natural Teak” offering in lieu of varnish and found it incredibly easy to apply and long-lasting, requiring no surface prep to speak up but a quick hand sand and power wash. For outside teak, Cetol cannot be beat.

• Incredibly easy to achieve satisfactory results • Affordable • Long-lasting even when exposed to UV

• Not as beautiful as real varnish • Softer and less durable to impact/abrasion compared to most varnishes, especially polyurethane formulations

Buy Cetol Marine Wood Finish on West Marine

Miniwax Helmsman Spar Urethane

The last product featured on our list is Miniwax’s one-part polyurethane spar varnish. While not the most beautiful finish available, this product is durable (hard and abrasion-resistant), easy to use, and very affordable, making it a good choice for touching up one-part varnishes inside a boat’s cabin.

For repairing, touching up, or even redoing cabin soles, this would also be a decent budget option and therefore is included on this list. Unlike the many UV-resistant offerings on this list, Miniwax Helmsman is not very UV-resistant and therefore is not recommended outdoors.

• Very affordable, even for a gallon • One-part polyurethane enhances durability and longevity over alkyd-based products • Good for sailors on a budget needing to repair and touch up existing interior varnish

• Not as beautiful as alkyd-based marine spar varnished • Not very UV-resistant • Yellows in sunlight

Buy Miniwax Helmsman Spar Urethane on Amazon (US)

Hempel Dura Gloss

Best solvent-based boat varnish

Hempel Dura Gloss Varnish is a urethane modified alkyd, ideal for interior use

Hempel’s Dura Gloss Varnish is a urethane modified alkyd, ideal for interior use

On the downside, alkyd varnishes lack resistance to abrasion and usually only one coat can be applied per day, which can make varnishing a drawn out process.

The more expensive types are formulated to speed up cure times, improve gloss retention and generally last longer.

Buy Hempel’s Dura-Gloss Varnish on Amazon

Varnish properly applied to brightwork is a joy to behold. Photo: Thornton Cohen/Alamy

Which type of boat varnish to choose?

Varnishing often appears to be a simple task, but there’s a bewildering choice of boat varnishes on the market, writes Rupert Holmes.

An understanding of the qualities of different types of varnish is needed to choose the optimum one for each purpose. This is particularly true for exterior woodwork which has to withstand the ravages of sun, rain and frost.

There are only a few basic types of varnish, although in many cases hybrid products are available, particularly alkyd/ tung oil and alkyd/modified urethanes that can offer a wider range of desirable properties.

Polyurethane boat varnish

Polyurethane varnishes are a harder option with good wear resistance, but they lack the flexibility of alkyds. In addition, they tend to sit more on the surface of the timber, so often do not adhere as well to the substrate, which can make them prone to flaking and chipping.

The lack of flexibility makes a pure polyurethane unsuitable for traditionally planked boats, but it can be ideal for plywood , as well as for cold moulded and strip planked hulls.

Polyurethanes are available as both one-pot and two-pot products, the latter giving a harder coating and faster cure, which allows multiple coats to be applied in one day.

Article continues below…

Boat wood: a complete guide for yacht owners

Boatbuilder and finisher Lyndon March explains which types of wood work best for different repairs and modifications on board

How to re-caulk teak decks: Vagabond 47 owners explain how they did it

First, they removed the old caulking between the planks using a Bosch Palm Router and pinned a guide into the…

Teak alternatives: How to make your decks look as good as the real thing

However, according to a recent report by the Environment Investigation Agency, there are grave questions over the sustainability and sourcing…

If you need to save the varnish overnight, take a look at this top tip on preserving two-part varnish in the fridge. However, they are a much more expensive option.

N.B. One-pot polyurethane can be applied over two-pot varnish but not the other way round.

Ultra-flexible single-pot polyurethanes, such as Coelan have an elasticity of more than 300%. It can also seal cracks, is highly resistant to impact damage and doesn’t need overcoating for several years and can last twice as long as traditional varnishes.

The biggest downside is that it’s four or five times more expensive than typical basic alkyd varnishes, so up-front costs are higher, although its long term performance means the total cost difference will be smaller.

Many boat varnish products can be painted, sprayed or rolled

Tung oil varnish

Tung oil is also frequently used in traditional varnishes: it soaks in well and, although a pure tung oil product will usually cure very slowly, the final finish is very tough.

Solvent-based varnish

Traditional solvent-based one-pot alkyd varnishes are ideal for use with traditionally built wooden boats. The coating is soft but flexible, which makes it resistant to cracking when used on timber that expands when wet and contracts in dry summer weather. Additionally, the initial coats tend to soak into the timber effectively.

Epoxy resin

Epoxy resin can also be used to coat timber, but generally has poor resistance to ultra-violet light, so a varnish needs to be applied over the top. Beware inexpensive ‘yacht’ varnish sold in DIY stores – the low prices are usually easy to explain in terms of extended drying times or poor long-term performance when used outside.

Dealing with surface damage? Don’t delay!

Whatever type of varnish is used, don’t delay on sealing any areas of damage. The key priority is to keep water out, so don’t wait until you have time and suitable weather for a full repair – touch in the damaged area immediately.

This may not have a silky smooth finish initially, but don’t worry. Even if it’s a few weeks before you’re able to do a proper fix you know there won’t be any further degradation.

Top boat varnish tip

A useful tip is to clean out one of the small match pots DIY stores sell to enable customers to test household colour schemes and fill it with varnish. They have a brush built into the lid, which never needs to be cleaned, thus making a quick touch up of damage a task that only takes a couple of minutes.

Find out how to get the best finish with these 8 top tips for varnishing .

Didn’t find what you’re looking for? Head to Amazon’s dedicated boating page for more marine products.

• International Marine Coatings
• International Protective Coatings

Cetol® Marine Natural Teak

With Next Wave™ UV-absorbing technology, it offers incredible protection from damaging UV rays. It’s durable, translucent and creates a rich golden color finish on interior and exterior woods above the waterline.

Find a retailer

There are many stores that sell Interlux products throughout the United States. Find a retailer that's near you.

Find a distributor

There are many distributors of Interlux products throughout the United States. Find a distributor that's near you.

Good to know

• Next Wave™ UV-absorbing technology offers incredible UV protection
• Easy to apply and maintain it creates a traditional classic look that every boat owner loves
• Specialty resins and advanced UV absorbers that provide greater protection, durability and longevity

Download technical datasheet

Contains detailed information on everything from the substances used to the application method.

• Technical datasheet - EN (PDF 32KB)

Technical data excerpt

Safety information.

The safety datasheet contains detailed information for the current formulation of this product such as hazardous ingredients, first-aid measures, fire-fighting measures, handling and storage. To make sure you have the right datasheet, please find the corresponding color and formula on your can. The formula is usually on the bottom. We provide safety datasheets for each latest formula. For missing safety datasheets, please visit our MSDS search site

Natural Teak

• Sales code IVA316
• Revision Date 20190627

Application guide

• English – Cetol marine guide

Suggested protective equipment

• Protective equipment overview

Advice on how to avoid problems

• Solve common problems

Check if this product is compatible with your current antifouling product

Simply use this tool to check compatibility with the antifouling product you already have on your hull. If you need any assistance, feel free to contact us for support.

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The Best Marine Varnishes for 2024

Boats often come in contact with a lot of different pressures such as waters, rocks, and even animals. On top of this, it is also exposed to the sun’s harmful UV rays all of the time. With this, the need for marine varnish became extremely popular among boat owners. It is actually one of the most effective things that any boat owner can do to preserve the beauty of their boat.

However, it is not that easy to find the perfect marine varnish that will work wonders for our boats. We have to experience a lot of trial and errors before we finally find what specific marine varnish is best for our lovely ships.

Do you want to keep your boat as pristine as possible? Read on to know about the top 10 best marine varnishes!

1. Rust-Oleum 207008 Marine Spar Varnish

2. epifanes clear varnish, 3. totalboat lust marine varnish, 4. system three 1855s16 marine spar varnish, 5. minwax 630500444 helmsman spar urethane, 6. interlux iva316/qt cetol natural teak varnish, 7. mccloskey man o’war spar marine varnish, 8. old masters 92304 spar marine varnish, 9. pettit captains varnish, 10. interlux y60/pt goldspar satin varnish, who is this for, factors to consider when buying a marine varnish, advantages and disadvantages of using a marine varnish, care and maintenance, frequently asked questions, best marine varnish reviews.

I was so stunned by this beautiful marine varnish! When I received it, I could immediately tell that it will perform amazingly. I sincerely appreciate that the company made sure that the application process will be easy! All I needed was a foam paintbrush to apply it on my boat’s surface and a good quality sanding sponge to smooth out the wood surface for a clean and even coat.

Unlike other varnishes, the company advises its customers to skip the thinner before using this product because it will affect the varnish’s performance by prolonging the drying time and increasing the chances of bubble formation.

Now, the most notable thing that I love about this product is that it dries so quickly! After the 1st layer that I applied on my boat, it only took roughly 2 hours for the spar varnish to dry. I am so flabbergasted because it was so convenient to use!

I love how I did not need to wait for at least 12 hours just to apply the 2nd coat of this marine varnish! This is such a good deal because not everyone has the time to let the varnish sink in. Although, you still have to sand the boat before applying the 2nd layer of varnish so that your application will glide as smoothly as butter!

As an oil-based marine varnish, it is better than a water-based marine varnish because it provides a more vivid color with a shine that does not look dull! Even though it is a little bit runny, its consistency does not affect its performance because it is oil-based. It sticks to the wood more comfortably, which is actually one of the reasons why it dries quicker!

• It does not require a thinning agent.
• Even application
• A quick drying time of 2 hours
• Can do two coats in one day
• Vivid and shiny
• It has a runny consistency

I have nothing to say but outstanding! I cannot get over the fact that this marine grade spar varnish performs exceptionally well. I am so excited to use this on my other boats because I’m sure that it will provide the perfect coating for protection and aesthetics!

First of all, I love how this product does not smell too strong! That’s one of the many things that I love about this epifanes marine spar varnish. Because of my countless attempts at finding the best spar varnish, I know how stinky some varnishes could be. It really is a hassle because some products have strong smells that give me a headache.

But this one was delightful to use because it almost does not have a strong chemical smell! I spent a lot of time using this spar varnish, and I can safely say that I did not experience any headaches.

I used a thinning agent before the first coat for this varnish because this product’s consistency is quite thick, almost similar to a syrup’s texture. Doing this resulted in a deep, high-gloss, and smooth finish! I cannot get enough of how beautiful the finished product is.

The company recommends a total of 8 coats, but I achieved my desired deepness and intensity with just five coats. Because of this, I have enough left varnish left for future use, which I sincerely appreciate!

I especially love that this product gives off a dark amber color. I prefer this type of finish because it made my boat look rustic yet fresh at the same time! And because it is on the darker side, it can cover old stains that may be present on your boat, so technically, it is a varnish and a light paint in one!

The wood on my boat started to look really nice once the spar varnish has dried. At the end of the day, it looked brand-new and ready to take on the fiery waters!

• It does not smell too strong.
• It did not give me headaches due to the chemical scent.
• Thick consistency
• Varnish and paint in one
• The recommended number of coats is 8

I think that is such a steal! For just half the container, I was able to apply five coats, and my boat looked very beautiful instantly. If I were you, I would get my hands on this beautiful spar varnish!

I received this totalboat gleam marine spar varnish; it was love at first sight! I immediately started to use it, and upon the initial application, I love how it enhances the woodgrain feature of my boat. Unlike other spar varnishes, this one does not try to eliminate the texture of wood; it makes it look more pleasing to the eyes!

Another thing that made my heart fall for this varnish is that it does not require the use of a sanding sponge or sandpaper. As I said, it aims to enhance the wood’s texture, so there is no need to even it out.

I also enjoy how with just six coats, I was able to finish varnishing my entire boat in one day. This made me fall head over heels for this product!

I also appreciate that this product features a slight tint that improves the overall design of the boat. No, it does not entirely cover up the boat’s original color; it makes the actual color brighter and more alive. I have had some experience with varnishes that dulls down the boat’s original hue, so I am happy that this one does not do that!

Lastly, the company offers two different types of varnish – one matte and one high gloss. Personally, I prefer a high gloss spar varnish because it lessens the appearance of scratches. However, some people enjoy matte varnishes, so kudos to TotalBoat for providing boat owners such as me with options!

Although it is quite thick, and I had to reapply varnish on some parts because, for some reason, the material does not adhere to it, I was still left with a beautifully-varnished boat at the end of the day!

• Improved my boat’s woodgrain texture
• It does not require sanding.
• Enhanced the color of the boat
• It has two different kinds of varnish
• I had to reapply varnish on several areas

To sum it up, I am so glad that I was able to try this product! For such a long time, I have been looking for the varnish that has a perfect balance between tint and gloss, and I finally found it in this product!

Upon receiving the product, I ordered both variants: satin and high shine. I decided to combine the two types of finish to get a more solid hue without losing the varnish glossiness.

I think I made the right decision! The end product is exceptionally smooth, glossy, and stable at the same time. I love how it is as soft as a baby’s butt… maybe even softer!

Because its consistency is quite thick, I used an HV/LP sprayer to apply it. This product applies like a dream. I’ve never used a marine varnish as smooth as this before. Therefore, the use of a thinning agent is totally necessary since it is viscous.

I also find its consistency to be quite thick. I love how this product really gave me the option to have my varnish on the thicker side or on, the thinner side. Well, I opted to thin it out a little bit using a thinning agent.

I love how it applies! For me, I would not use a bristled paintbrush with this product because there is a chance for bubble formation and streaky application. So, I used an HV/LP sprayer to apply it, and I honestly did not get tired at all!

I got so excited because I have never used a marine varnish that was as smooth as this before! I personally prefer mixing it with a thinning agent for the sprayer, but if you want it to be thicker, you may want to use a new paint roller to do the job.

Even though this does not dry as quickly as the other spar varnishes I have tried, I think those good things really do come to those who wait. As I used this product, I learned to be patient and to keep on trusting the process.

In the end, I got the best-looking boat ever! On top of that, this one also has superior saltwater protection for my boat. I can honestly tell you this: I think this is such a great deal!

• Available in satin and high shine
• Thick consistency for fuller application
• Best used with a paint sprayer
• Saltwater protection
• Excellent finish if both variants are mixed.
• Long drying time

Honestly, I think I got such an excellent deal with this product. This could easily be the best marine varnish UV protection!

This one is for the boat owners who prefer marine varnishes without any tint! This product from Minwax is a water based marine varnish, and this means that it is a clear gloss that does not have any color to it.

I love how this could be used on top of colored boats. Since it does not alter the existing shade that the ship has, this is a good option for those who prefer to maintain the current color, brightness, and contrast of their boats.

Its consistency is thin, mostly because it is water based. With this, I used a paint roller. I got the most seamless application because a thin consistency goes well with a roller! I am in awe that I only had to use a sanding sponge or sandpaper before applying the first coat. The succeeding layers did not require any sanding because they glide on like a dream!

Overall, it took me a total of 4 coats to get an excellent finish. However, I added an extra layer to be sure that the end product will be as beautiful and vibrant as possible.

I love how to apply this even over latex paint, unlike other varnishes with spar polyurethane as an ingredient.

This goes to show how dedicated the company is to provide us with quality products that won’t be inconvenient to use.

The only issue that I came across is that it tends to crack whenever I suddenly apply too much. I was able to remedy this by ensuring that each layer is skinny to avoid any separation of the varnish.

• It does not have a tint
• It does not affect the original color of the boat
• It can be used over latex paint
• It has a tendency to crack if too much is applied
• Thin application per layer is needed

This one is indeed a tremendous marine varnish to let the right color of your boat shine through. I highly recommend this beautiful marine varnish!

I have to say that this product is a rare breed! There are two common types of marine varnishes, and these are the high gloss and the matte variants. It is uncommon for the market to offer a satin varnish. Satin is a cross between a high luster and a matte finish; it has a shine, but it is also relatively flat. Basically, it is the best of both worlds!

My boat is made of a wood called teak. Honestly, I believe that this product from Interlux is the best marine varnish for teak! I did not have to use any unique tool to make it look splendid. No thinning agent and sandpaper had to be used because this boat varnish already does a great job in penetrating teak and, honestly, other types of wood effectively!

This product has a golden hue. It is the perfect shade for my boat’s wood! I love how it made my boat look expensive and well-kept. It also has a knack for giving a boat its personality!

I was able to see it personally because my boat’s color has already faded. But soon after applying this boat varnish, its color started to come alive! It slowly became brighter and radiant. Suddenly, my faded boat transformed into a beautiful ship with a rich and deep copper hue.

Even though this product can only be applied right above the waterline both for interior and exterior portions of the boat because it is not effective against saltwater, it is still not a bad deal because this varnish is not only useful for boats. It can also be used as an alternative for tables, chairs, and doors!

• Satin finish
• Penetrates teak effectively
• It has a golden hue
• Alternative varnish for tables, chairs, and doors
• Only useful above the waterline
• Not effective against harsh saltwater

Because of the fantastic quality that this product offers, I simply cannot get enough! I’m sure that I will be using it again soon for my other boats.

This marine grade spar varnish proves that a boat undergoes a lot of adverse conditions both while sailing and while being stored. As a varnish, I love how this product is very well-versed when it comes to being durable!

I am so amazed because it does not peel easily, unlike other marine varnishes that I have used in the past. It stays put for a long time, and it does not crack. It is very different from polyurethane-based varnishes because this one from McCloskey/Valspar screams flexibility. It has the power to adhere onto various surfaces, and it sinks deep into the wood quite decently.

It is made with tung oil instead of urethane. It can be seen as old-school because it does not have the synthetic material that modern varnishes contain, but whoever said that old-school is terrible? Actually, tung oil is useful, and it gives off a beautiful finish!

I specifically go crazy about this product because it is thick and pigmented enough to provide a certain degree of coverage. I love that it is useful as a corrector; it completely covers the tiny scratches and stains on my boat’s surface!

But still, this product is not advised to be applied on decks. It is a high gloss varnish, so when it gets wet, there is an excellent chance for the surface to become extra slippery. To avoid accidents on the deck, I decided to apply a matte marine varnish instead.

• Extremely durable
• It does not peel and crack easily.
• Flexible; can be used on different surfaces.
• Made with tung oil
• Thick and pigmented
• Can cover stains and scratches
• It can’t be used on the deck
• Slippery when it gets quite wet

For me, I will still go for this product even though I can’t use it on my deck. It gives some of the best gloss that I have seen, and it is very durable!

What a beautiful product! All I can say is wow! This marine varnish is quite exceptional! This company really is the Old Master of the varnish industry. The sun is known to be a catalyst for the faster aging process of wood and paint, which results in brittle and faded-looking boats.

I am so happy that I have this product, which is perfect for absorbing the sun’s harmful UV rays, so it worked well as my boat’s exterior marine varnish! I love how it can be used above and below the waterline so I could still protect the bottom half of my ship from fading quickly.

Although this product works well as exterior spar varnish, I am in awe because it is also useful as an interior varnish! Because of its satin finish, the deck would not feel slippery even when the area is wet. I love how the safety of all riders is guaranteed because of this varnish!

However, it took me three days to finish the entire application process because the drying time took 5-8 hours per each coat. But even though the process took quite some time, I was not disappointed with the result that I got!

After patiently applying eight coats, I was left with the most marvelously looking boat! It seemed very mysterious; not too shiny, not too matte. Now, my boat has the perfect coating!

• Absorbs the sun’s harmful UV rays
• Perfect as an exterior marine varnish
• It can be used below the waterline.
• Also great for interior portions of the boat
• It prevents boat aging and fading
• Not too shiny, not too matte
• The drying time is 5-8 hours per each coat

Because of this product, I am so glad! I was left with a good-looking and well-protected boat. I could not ask for more!

I am so happy that this product is a water based marine polyurethane varnish. It can be challenging to find a glossy varnish that is water based because most glossy varnishes are oil based. Because of this, I am always on the hunt for a water based product that is a high gloss, and finally, here it is!

I love that this product is exceptionally eco-friendly because it does not contain VOCs or volatile organic compounds, which can be harmful. Varnishes usually release these, and long-term exposure to these chemical compounds can result in long-term health effects.

I am so relieved to finally see a marine varnish that does not negatively affect humans and species that reside in water. I love how this company went the extra mile just to give us a healthier alternative to the usual varnish formula that we get in the market!

Another reason to stan this product is its exceptional clarity! Upon using this, I could immediately say that it produces a very smooth, flexible, and clear varnish. I am so happy because I did not have a hard time applying it on the boat.

I really like how this varnish was able to encourage the improvement of my boat’s woodwork! It did not weirdly interact with the ship, and it actually sank into the wood utterly. This is one of the best features of this product!

Now, let me tell you about its leveling property! This is the smoothest and most even varnish application I have ever experience. I love that it glides on smoothly and allows room for error. You can go over a wet varnish as many times as you want!

• High gloss, even though it is water based.
• Eco-friendly
• It does not produce volatile organic compounds.
• It does not pose harmful health problems.
• Exceptional clarify
• Improves woodwork
• Amazing leveling property
• Allows room for error during application

As a water based varnish, I cannot believe that this is as amazing as it is! If I were you, I would stock up on this product, especially if you have multiple boats!

Indeed, a fantastic product! This marine polyurethane varnish gave my boat an amazingly bright and lively hue. I love how it did not change my boat’s color; it only brightened it up by introducing a nice sheen on top of it!

For this one, I decided to use a bristled paintbrush because it made the application smoother and more even. It went on in a more uniform layer, which makes layering seamless and effortless! Even though it has a thick consistency, it works well with a brush. I love how it did not form any air bubbles!

Because it is quite thick, the drying time is kind of long. I applied it for a total of two days, and on the first day, when the temperature was low in humidity with excellent air circulation, each coat was able to dry for just 5 hours. However, the weather was a little more humid on the second day, and each coat dried for 7 hours.

I love how hard this product is once it is dry! Because of its thick consistency, it was able to cover my boat’s surface better than other marine varnishes. It can resist stains, scratches, and other minor physical damages that roaring waters and sharp rocks can cause. I love how I can be assured that my boat will look its best even when I sail rough waters!

When I started to check how it feels inside the boat, I was taken aback because it did make a huge difference! I thought that the interior had a new coating, but it did not feel slippery at all. I can assure you that this marine grade varnish for wood is very useful in providing a safe surface for passengers!

I am quite disappointed with this because obviously, one of the main reasons why we, boat owners, invest in great marine varnishes is because of its UV protection. Although this product offers a great sheen and exceptional thickness, it, unfortunately, cannot prevent the boat from aging and fading.

• A modified version of polyurethane
• Did not form any air bubbles and streaks
• Thick consistency offers excellent protection.
• Resists stains, scratches, and other minor physical damages
• Not slippery
• It does not have UV protection.
• It can’t protect my boat from aging and fading.

I am very fond of this product. I can see myself using it more in the future, although it will work best as an interior marine varnish!

The marine varnish is for people who are passionate about improving their boats’ appearance. Other than that, it can also be used as a substitute for the typical varnish that is used for daily materials such as doors, windows, chairs, and tables.

Boat Owners

The marine varnish is for boat owners because they take pride in their boats’ beauty and maintenance . Boat owners need to apply marine varnish on their ships because it protects the wood against the rigorous events that take place while sailing.

Marine Artists

Marine artists also need marine varnish because they are responsible for doing the dirty work that most boat owners prefer not to do. They get paid to paint, design, and apply varnish on boats so that the wood is protected and well-maintained.

Varnishing is an essential aspect of carpentry because it strengthens wood. It provides a protective layer between the wood and the outside world, which could pose harmful threats to the wood.

Marine varnish, sometimes referred to as spar varnish, is a term that is quite famous in the boating world. This specific type of varnish is a finish specially designed to protect boats from the harsh conditions they experience during sailing. It is one of the essential materials that a boat owner has in their arsenal of boating essentials.

There are a lot of different options when it comes to purchasing a marine varnish. Here are some of the best features that you might want to consider before buying one:

UV Protection

This is the main reason why marine varnish was specifically made is for it to act as a UV blocker against the sun’s damaging UV rays. As you shop for your next varnish, it is vital to make sure that you are getting one that has the best marine varnish UV protection because it will help to prolong your boat’s life.

Remember that a protected boat will always remain on top of its game. It will not age, fade, and get damaged easily.

High Gloss, Satin, or Matte

There are three different finishes that marine varnish comes in:

It will make your boat appear new and shiny. This variant is best used for the boat’s exterior area because it tends to become too slippery if used inside the ship. Accidents may happen, such as accidental slips, which could result in harmful injuries.

As you can tell, this finish is entirely flat and free of any shine and gloss. This is the best choice for your boat’s interior area because it will provide you and the passengers the perfect surface texture for walking and standing.

This finish is perfect for both exterior and interior portions of your boat. It has a sheen, but it is not too glossy. It is a fusion between a high gloss and a matte, which leads to a perfect finish that is suitable for any boat.

Tinted or Untinted

A tinted marine varnish has the capability of slightly altering the original color of your boat. It will most likely produce a more resonant tone that will complement the color of your boat’s wood. Usually, oil based marine varnishes have tints.

Basically, this form of marine varnish does not have any color to it. If you prefer to maintain your boat’s paint but you want to add some gloss and protection to it, you may opt for this variant. Typically, water based marine varnishes are untinted.

Oil Based Or Water Based

As mentioned above, oil based marine varnishes have a tint to them. It could be amber, golden, or a rich copper tone. As time passes by, rest assured that your boat’s tint will get more prosperous and more profound.

I like this type of marine varnish because it does not try to hide the wood grain of the boat. It actually aims to improve its texture, not cancel it out. It is also essential to take note that oil based marine varnishes are glossier if compared to water based marine varnishes.

Water based

This base has no color at all; it is transparent. It only provides gloss because it does not affect the original color of the boat. However, this has the tendency of flatting out the wood grain of a vessel.

Again, take note that even though water based marine varnishes are still quite glossy, it is still less glossy than oil based marine varnishes.

Marine varnish’s sole purpose is, in simpler terms, to protect the boat from aging. It can block the sun’s UV rays, which can slowly but surely deteriorate the wood’s quality and color.

Most marine varnishes in the market nowadays are effective in protecting the wood against harmful light. This will ensure the boat owner that their boat will maintain its quality for an extended period of time.

Aesthetically Pleasing

The varnish is used to enhance the wood’s appearance. It provides shine and evenness across the entire wood surfaces. It reduces the wood’s porosity by sealing each area; it penetrates the wood without damaging it. It also keeps tiny wood parts in place to avoid woodcut incidents.

Covers Micro Tears, Scratches, and Stains

Marine varnish can also serve as an additional cover over micro-tears, scratches, and stains. Even though your boat has some scratches, rest assured that a few coatings of the best boat varnish will thoroughly cover it up. Also, it is thick enough to resist minor physical damages.

Disadvantages

Slow Drying Time

Some, not all, marine varnishes tend to dry slowly. So instead of getting the job done within a day, you might have to work for 2 to 3 days just to finish all of the needed varnish layers.

Can Contain VOCs

Most marine varnishes nowadays contain Alkyd or Polyurethane synthetic products. Although they provide excellent results for applying and retaining the varnish onto boats, they produce high amounts of VOCs or volatile organic compounds.

VOCs are gases that Alkyd and Polyurethane emit into the air. It is associated with the formation of cancer within the human body. It also has the capacity to interact with other forms of gases, which could result in both short-term and long-term health issues.

Some other health issues that volatile organic compounds pose are the following:

• Irritation of eyes, nose, and throat
• Dizziness and headache
• Memory loss
• Visual impairment
• Sick building syndrome

Clean Before and After Sailing

As a rule of thumb, always clean your boat’s surfaces before and after sailing . Not only will it make sure that your varnish is well-kept and beautiful-looking, but it will also lengthen the life of your boat.

While cleaning, do your best to get rid of all sorts of grime and dirt. Check both the interior and exterior. It is also a smart choice to do a thorough cleaning at least once or every two weeks. Not only will it keep your boat hygienic, but it will also make your boat maintain its best shape.

Apply New Varnish If Needed

Yes, you have fully applied marine varnish on your boat’s surfaces. However, you need to check for the need to reapply every now and then. Keep in mind that it is always better to prevent damage rather than to repair it.

By doing a monthly check-up, your boat’s safety and elegance will always be assured. If you can see certain varnished spots that have thinned down, reapply several marine varnish coats onto that area to avoid the promotion of wood brittleness.

Where can I Buy a Marine Varnish?

There are a lot of different places where you can purchase a marine varnish. Here are some of the most common establishments where you can find the best marine varnish for your boat:

• Hardware stores
• Department stores
• Ship’s stores
• Marine stores

Can a Marine Varnish be used on a Deck?

Yes, you may use a marine varnish to enhance your deck’s beauty and UV protection. But make sure to choose a matte or satin marine varnish so that the deck would be safe to walk on. Avoid using high gloss marine varnishes because they will be too slippery to walk on and may result in unwanted accidents!

Does a Marine Varnish Effectively Waterproof a Wood?

In a way, it does provide a non-porous layer between the wood and the outer area. Think of marine varnish, especially polyurethane marine varnish, as a thin plastic that clings onto the wood. If you put in enough oceanic varnish layers, you will successfully get rid of any porous areas, directly waterproofing the wood.

In a nutshell, every boat owner has to have a little bit of knowledge on marine varnish because it is one of the most effective ways to preserve a boat’s health. With just one session of marine varnish application, their craft will be protected for a long time.

The marine varnish is essential to protect boats from getting older instantly. As much as possible, we have to do our best to take good care of them because, let’s face it; they cost quite a lot! This list of the best marine varnish of 2021 will surely give you some ideas about which varnish to purchase!

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• Boat Maintenance

Exposure Test Results: Varnishes, Teak Oils, and Other Exterior Wood Coatings

Practical sailor testers rate test panels on gloss and color retention and coating integrity..

Science and technology have turned the once-simple task of choosing a wood coating into a brain-numbing chore best suited for those with a degree in chemistry. From the basic, old-school tung oil or spar varnish, coatings have evolved into synthetic concoctions that last longer, protect the wood better, and are easier to apply. Their formulas include blockers for UV rays, additives we can’t pronounce, and pigments that look more like paint.

To help navigate this coatings evolution, we mounted a long-term test of exterior wood coatings in 2007 in search of the ideal finish among the tried-and-true and the market newcomers. We refrained from limiting the test to a single type of exterior coating and are instead looking for an overall all-star. Weve kept the test field broken into type categories-one-part varnishes, two-part varnishes, synthetics and treatments, and sealers and oils-which hopefully will make it easier to digest and also will allow an apples-to-apples and apples-to-oranges comparisons. Our goal is to find an exterior wood finish that is relatively easy to apply, easy to maintain, lasts for multiple seasons, and wont break the bank.

This long-term exposure test began with reports on the application and original finish of more than 50 products in the August 2007 (one-part test varnishes), October 2007 (varnish alternatives), December 2007 (two-part varnishes), and April 2008 (teak oils and stains) issues. Our first evaluation of the coatings durability was reported in May 2009. Six-months later, testers returned to the test rack to see how the finishes fared after a year in Florida.

How We Tested

Testers are evaluating the wood coatings based on three main criteria: ease of application; the integrity of its gloss and appearance; and how it fares over time under real-world conditions. The results, listed in the Value Guides on pages 14 and 15, will determine which type of coating offers the best and longest protection, and they will show which products stand out among their peers.

Each product was applied per manufacturers instructions to a section of bare solid teak, and each panel was assigned a number to ensure blind judging.

Testers rated each products ease of application-how smoothly it went on, how complete the instructions were, and how simple the process was. With the varnishes, testers also evaluated the original gloss shine and reflective qualities. Coatings intended to have matte or semi-gloss finishes, like teak oils and stains, received no “original gloss” rating.

In summer 2008, the panels were mounted on a rack in an unobstructed area on the roof of the Practical Sailor workshop in Sarasota, Fla. The rack was set up at a 45-degree angle to ensure that all panels received the same amount of exposure to the weather and sun. The top part of each panel was covered, giving testers a control area to compare the weathered area and original finish over time.

How We Rated

After a year exposed to the Florida weather, the finished panels were rated for coating integrity, color retention, and gloss retention. Coating integrity ratings took into account the entire panel. Excellent ratings were given only to those with a totally uncompromised coating. Panels with Poor ratings were pulled from the test.

Color and gloss retention ratings are relative to the panels original finish, not the finish of other coatings. So although a panel may have had only a Fair rating for its initial gloss, if it maintained that same level of gloss for six months, it earned an Excellent for gloss retention.

Initial gloss and ease of application are relative to the field within each coating category, and these were assigned immediately after the panels were coated.

One-Part Varnishes

A year into our long-term exposure test, 20 of the original 22 one-part varnishes are still in the running. In real-world application, those rated “Fair” for coating integrity (See Value Guide, page 14) would be due for a maintenance coat, but none have failed to the point that would make a fresh coat or touch-ups difficult.

Three panels dropped from Excellent to Fair ratings in coating integrity at the one-year mark: Pettit Bak V-Spar, Interlux Jet Speed varnish, and Le Tonkinois No. 1. The V-Spar coating appears to have simply worn away-no cracking or peeling-so a maintenance coat would require minimal sanding. While it fared well in past tests and in the six-month checkup for this test, the Interlux Jet Speed is not recommended by makers for use on exterior wood unless an overcoat is applied.

The Jet Speed and Le Tonkinois No. 1 also were among a handful of finishes that lost most of their luster, earning a “Poor” for gloss retention. These two, along with Le Tonkinois Bio with Vernis overcoat and Le Tonkinois Vernis, showed tiny, barely perceptible cracks in the coating. The finish, upon close inspection, looked very much like dry, winter-ravaged skin.

Le Tonkinois distributor, American Rope & Tar, recommends re-coating the finish as soon as it begins to look dull: “Le Tonkinois is not a no-maintenance varnish, but is a low-maintenance varnish,” they explained.

The varnish panels that saw the biggest change in color after a year in the Florida sun were those finished with Coelan (with primer) and Interluxs Schooner. The Coelan panel, originally a medium brown color, took on a reddish-amber hue. The coating is still very much intact, and its gloss is still excellent. (We would expect no less of a varnish that costs nearly $150 per kit and requires a primer.) The Schooner lightened from a warm golden brown to a light amber.

Since our test began, Pettit discontinued its Bak V-Spar and Interlux replaced Schooner and Goldspar Clear and reformulated Perfection, boosting UV protection and making other performance tweaks. The new coatings hit store shelves this fall and are being sold as Schooner Gold, Compass, and Perfection Plus. The Compass is being marketed as a fast-dry finish with a three-hour re-coat time. These will be included in future tests.

While most of the varnishes are still performing well after a year, testers top picks so far are Epifanes Clear High Gloss and Wood Finish Gloss, and Pettits Z-Spar 2015 Flagship and Captains 1015 Traditional Amber. They also were impressed with Interlux Goldspar Clear and Coelan, but the Goldspar is no longer available and the Coelans significant color change dropped it from the top ranking. Those finishes that are skating on thin ice going into the next round of testing are Interlux Jet Speed, Le Tonkinois No. 1 and Pettit Bak V-Spar.

Bottom line: The Best Choice varnishes after a year are Pettits Clear High Gloss and its Wood Finish. The Budget Buy one-part varnish is the oil-based Ace Spar Varnish Gloss (16373), which rated “Good” in every test and has a dirt-cheap price: $8 per quart.

Two-Part Varnishes

Not surprisingly, all six of the original contestants still remain in the two-part varnish matchup. There were, however, a few surprises in this category, which is typically thought to offer the best single-application longevity compared to one-part varnishes and synthetics or oils.

C-Tech Marines Bristol Finish and Signature Finishes Honey Teak two-part varnishes have generally tested quite well in past tests. But after a year in this long-term test, both are already showing signs of compromised coating integrity.

The Honey Teak is failing along the panel edges. On a boat, these areas would need to be cleaned and sanded well before any touch-up would be possible. The failure along the panel sides could possibly be attributed to thinner application to those areas. Maker Signature Finishes also was surprised by the early failure. “Premature failure is generally due to an insufficient amount of the honey base, which contains all the UV” protection, maker Tom Fabula explained. “Thank goodness this product can be spot repaired invisibly, and a coat of the honey base on top of previous clear topcoats will bring the longevity up to par.”

The Bristol finish is pulling away at the bottom edge, and there are a few small bare spots on the panel front. These appear to be nicks that would be easily repaired with a touch-up routine. (See page 18 for more on touching up finishes and maintenance coats.) The Honey Teak and Bristol both have shown excellent gloss and color retention, however.

Testers overall favorites in this group after one year are Interlux Perfection, Nautiking Nautithane, and the Smith & Co. Five-Year Clear. None of these two-part systems are cheap, but they should last longer than other finishes, so theoretically, you get as much bang for your buck because re-coats will be required less often than less-expensive coatings.

Bottom line: The Perfection and Nautithane are in the same price range, but Perfection stocks are being phased out; were hopeful the formulation performs as well. Nautithane also edged out Smith & Co., only slightly, in integrity, giving it our top pick among these two-parters.

Varnish Alternatives / Teak Oils

As expected, the test fields to see the most changes to their rosters in the last year were varnish alternatives, teak oils, and teak sealers: Of the original 17 products, only 12 teak treatments made it to the one-year checkup, and most of those were the two-step systems like Cetol that included a clear gloss overcoat. The group of eight teak oils and sealers had been whittled down to one coming in to the one year test.

Teak oils are not meant to be multi-season coatings, but Star brite Tropical Teak Sealer held its own at the six-month mark. After a year of exposure, though, the panel is well past due for a re-coat and will be dropped from the test rack.

The panel finished with TeaQua, a pigmented sealer, also is in need of re-coating. In the areas where the coating failed, black mildew spots appeared, so this panel would require a bit more effort to freshen the coating. It too should be re-coated well before the year mark and will be dropped from the test rack.

The Cetol panels, for the most part, are still going strong. The panels coated with Interlux Sikkens Cetol Marine and a gloss topcoat and Marine Light with a gloss overcoat both rated very well. The coating integrity is flawless and the gloss unchanged; however, these finishes were initially “muddy” and have retained that quality. Aesthetically, testers prefer the clear look of the Cetol Natural Teak, but it doesn’t seem to offer as much protection as its pigmented sister finishes. The Cetol Natural sans gloss overcoat has begun failing at the panel edges.

Another pigmented synthetic, WoodPlus Marine, has shown acceptable protection and performance.

Bottom line: The results are consistent with past tests: Liking Cetols cloudy finish is a subjective matter, but when it comes to single-application longevity, the Cetol Marine and Marine Light with gloss reign supreme among varnish alternatives.

Conclusions

Competition for the title of “ideal wood coating” remains strong between coatings types at the one-year mark. While varnish in general appears to offer better durability, some synthetic systems-namely those with protective overcoats-are holding their own, especially when it comes to UV protection and color retention. Teak oils can’t be expected to last the longhaul on a single application, but Star brites teak sealer survived a surprisingly long time.

“Ideal” is a subjective term. To determine what the ideal finish for your boat is, decide what time and energy investment you can make up front for application, how often you realistically will apply maintenance coats, and where and how you plan to use the boat. (See “DIYer Notebook” on page 18.)

Traditionalists who want that high-gloss, wet look and are willing to put forth a little extra effort in application would do well with any of the recommended two-part varnishes. These hard coatings have proven durable and most likely wont need re-coating for years. Our favorite at the one-year mark is the Nautiking Nautithane.

If you find the two-part kit prices (and application headaches) to be too much but still want a good gloss, choose from one of the recommended or budget buy one-part varnishes or varnish alternatives with an overcoat.

The Cetol products offer the best option for taking the middle ground between good looks and durability. They wont have the classic look of varnish, but for 25 percent of the labor, you get a similar result.

For spots where a slippery-when-wet finish is not feasible, check out the top synthetics or teak sealer. Our favorite for coating decks is still Semco. It will need to be re-applied every few months, but done regularly, the process should be easy.

Any of the recommended products listed in the Value Guides on pages 14-15 would serve well for a year or more. Stay tuned for the two-year checkup next winter.

• ONE PART VARNISHES AND TWO PART SYSTEMS
• VARNISH ALTERNATIVES, TEAK OILS, AND TEAK SEALERS
• WOOD FINISHES 1 0 1
• WOOD FINISHED COMPARED
• DIYER NOTEBOOK
• Download PDF Format

RELATED ARTICLES MORE FROM AUTHOR

As a young sailor about 65 yrs ago being taught how to varnish when I work on motor a and sailing yachts we used.. A super varnish that our Skipper found by accident .. Sold only in WOOLWORTHS chain store ..it was brilliant stuff after a couple of years it was labeld SPAR .VARNISH ..It really lasted well ..

I was rather hoping that you would include wood protected by a combination of West System clear resin covered with varnish. I’m about a week from redoing all of of my wood on my boat and read about this method years ago and was going to try it out. It sounded like a simple method for a long-lasting finish. https://www.epoxyworks.com/index.php/varnish-over-epoxy/

Is there a typo in the “Bottom Line” of the one part finishes? The report seems to indicate that Epifanes High Gloss and Wood Finish are preferred, but the Bottom Line recommends “Pettit Clear High Gloss and its Wood Finish”. Not sure which is which. In future tests, would like to see Epifanes RapidCoat/Rapid Clear evaluated- RapidCoat is a bit similar to Cetol, but at a much lower pigment level (about 1/3 per Epifanes), and like Cetol and Wood Finish, does not require sanding between coats- a bit benefit on complex shapes (now working on a 4′ diameter oak grating- impossible to sand all of the surfaces between coats!)

I have good luck with Cetol Natural Teak (3 coats) with Cetol Gloss (2 coats) as an overcoat. This is in Southern California so we see a lot of sun as well. The advantage of the Natural Teak is that allows the natural grains of the wood to show through as opposed to the more heavily tinted Marine and Marine Light. For a fair test of these 3 products, each would require the Gloss overcoat.

I wonder if you could test Waterlok (both the original and the new H2Olock, low volatiles, which I have not used). We have a summer house near the beacn and white pine floors. Varnish finished were failing do to kids and dogs tracking in water and sand, dog claws, etc. A friend here had the same issues of water on the floor, and when he laid down a reclaimed cherry floor, used WaterLok after testing various finishes on sample pieces of wood. One of his tests was laying a constantly wet towel on the wood for 5 days. No problem and 5 years later his froors look great. Two years ago we had our floors stripped and refinished with the original Waterlok. The floor look GREAT. and compared to vanish it is easy to touch up dog claw scratches and other damage to the surface from dropped objects, etc (white pine is soft) with a small brush and Waterlok, with no need to sand prep or feather the edge. Of course, inside a house, even with big south facing windows is not the same as outdoors an salt spray, but based on the performance I’ve seen so far, this may be very promising for boat use.

I believe this has already been noted but you meant to say Epifanes not Pettits Clear High Gloss and its Wood Finish in your one part bottom line. I would also like to see you test the AwlGrip Awlwood product. I have personally been using it for the past five season and I have found it outstanding on many levels and I used to be a diehard Epifanes user.

In regards to the Bottom Line for the One-Part Varnishes, does the author mean “The Best Choice varnishes after a year are “[Epifanes] Clear High Gloss and its Wood Finish” v. “Pettits Clear High Gloss and its Wood Finish?” Both the Epifanes Clear High Gloss and Wood Finish are our go to one part varnishes.

Thank you PS for a great article!

Reference While most of the varnishes are still performing well after a year, testers top picks so far are Epifanes Clear High Gloss and Wood Finish Gloss, and Pettits Z-Spar 2015 Flagship and Captains 1015 Traditional Amber. They also were impressed with Interlux Goldspar Clear and Coelan, but the Goldspar is no longer available and the Coelans significan’t color change dropped it from the top ranking. Those finishes that are skating on thin ice going into the next round of testing are Interlux Jet Speed, Le Tonkinois No. 1 and Pettit Bak V-Spar.

Bottom line: The Best Choice varnishes after a year are Pettits Clear High Gloss and its Wood Finish. The Budget Buy one-part varnish is the oil-based Ace Spar Varnish Gloss (16373), which rated “Good” in every test and has a dirt-cheap price: $8 per quart.

I recently committed the ultimate sin: I painted my teak toerails with gray Brightside one part polyurethane paint (GASP!). I had become disillusioned after the poor performance of varnish and Cetol only holding up for a couple of seasons and I have better things to do with my time. I would be curious for Practical Sailor to do a study on the longevity of paint over teak and which brands are best for wear/U.V./gloss retention etc…..then compare said results to the best of the varnish/cetol. I know paint dramatically changes the look of the boat but my wife and I think it looks pretty nice and gives the boat a clean, modern appearance.

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