The Best Marine Epoxy for 2021

Nicholas Swartz
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Are you restoring a boat? Building something out of wood? Fixing a fence? Then you could benefit from using marine epoxy. Marine epoxy bonds surfaces together to make them stronger and is also water-resistant.

Keep in mind that marine epoxy is designed to bond materials like plastic, glass, wood, and metal for the marine environment. It’s not the same as a typical epoxy or adhesive you would use to fix a leaky pipe for example.

If you’re looking for marine epoxy, there are a few things you need to know before you buy the wrong one. We’re going to highlight a few different types of marine epoxy, what to look out for when choosing one, and review some of the best marine epoxies on the market.

NameCategoryProduct
J-B Weld 8272 MarineWeld Marine EpoxyBest OverallJ-B Weld 8272 MarineWeld Marine Epoxy
Loctite 1919324 Marine Epoxy 0.85-Fluid Ounce SyringeBudget PickLoctite 1919324 Marine Epoxy 0.85-Fluid Ounce Syringe
TotalBoat 5:1 Epoxy Resin KitsUpgrade PickTotalBoat 5:1 Epoxy Resin Kits

1. J-B Weld 8272 MarineWeld Marine Epoxy

Our rating: 9 / 10

J-B Weld 8272 MarineWeld Marine Epoxy

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Pros:

  • Takes a lot of time to harden with a two-day setting time
  • Can withstand pretty high temps up to a maximum of 200 Celsius
  • Strong adhesive bond

Broken down, the J-B Weld 8272 has two key ingredients: J-B KwikWeld is the epoxy and 8272 is the catalyst that hardens it.

The Epoxy is thick, dark tan, and is designed to cure under pressure. If you’ve ever used super glue before then you’ll know that when it bonds with something it gets really hard and appears rock solid.

When mixed, the J-B Weld Epoxy hardens at around 500 degrees Fahrenheit. However, when applied to hot surfaces, it will also become hot which means you’ll have to work quickly.

2. TotalBoat Epoxy Resin Crystal Clear

Our rating: 9 / 10

TotalBoat Epoxy Resin Crystal Clear

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Projects, Wood Stains and Resins Epoxy.

This epoxy kit that is available at Totalboat helps users create a suitable long-lasting and strong surface. The total time needed to finish this project is about 16 hours.

This product offers a crystal surface that is free of yellowing, which means that once you’re done with this project, you can sit back and admire your work for years to come.

3. West System 105A Epoxy Resin

Our rating: 8 / 10

West System 105A Epoxy Resin

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The West System Epoxy works well with both wood and fiberglass, even if these materials are of different types. It is also well suited for small crafts representing a variety of materials such as metal, plastic, resin, and stone. The Epoxy is resistant to ultraviolet radiation that causes most polymers and resins to rot or age prematurely, giving it a long service life. In addition, it is unaffected by moisture and can be used in wet environments. All of these traits makes the West System Epoxy a good option for boat owners.

It is worth mentioning that some products may not be suited for marine environments just as their counterparts may not be suited for land environments. The West System Epoxy is used for building boats and doing repairs, not for as surface coating for daily use. While the System is exceptionally strong it is flexible, this means its excellent resistance against pressure is reduced. It is important to keep this in mind when working with it.

As the name indicates the West System Epoxy Resin comes in two varieties namely the 105A and 205A. The 105A is the weaker variant, meaning it is thinner and cures faster. It is also easier to repair and more flexible. The 205A is stronger and therefore suitable for large areas of high stress. The 205A is also heavier and therefore less viscous.

4. Loctite 1919324 Marine Epoxy 0.85-Fluid Ounce Syringe

Our rating: 8 / 10

Loctite 1919324 Marine Epoxy 0.85-Fluid Ounce Syringe

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Pros:

  • Good fix for loose rusted items
  • Stronger than some other epoxies
  • Doesn’t always require masking tape
  • Can be sanded once dry
  • Easy to sand and paint
  • Works well with metal, wood, glass, and ceramics

Cons:

  • Needs to cure for longer than other epoxies
  • Doesn’t hold well on rough surfaces
  • May need sanding after cure
  • May take some time to apply evenly
  • Use with a good epoxy dispensing gun for best results

Super Glue by Loctite is a versatile epoxy that’s great for hobbyists. Its transparent formula that’s meant to blend well with most surfaces. It’s easy to use and you can count on it to fix virtually anything.

What we like about this epoxy is that you can use it on virtually any surface without the need for masking tape.

However, you’ll still want to keep the blade lightly oiled, especially when working on metal, to make sure it doesn’t rust.

5. PC-Products PC-11 Epoxy Adhesive Paste

Our rating: 8 / 10

PC-Products PC-11 Epoxy Adhesive Paste

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Pros:

  • Very strong when cured, you can scale it to any size without worry
  • It dries quickly
  • Doesn’t require mixing
  • Additional components can be added to this epoxy for different properties
  • Quick to use: 5-10 minutes
  • Hardens underwater
  • No clogging of nozzles

Here you have a two part epoxy that can be used as an adhesive for many different purposes, including the underwater epoxying. You can use it as bond between fiberglass and other surfaces, or to anchor boats.

It’s been manufactured specifically for marine and underwater purposes, so normally it can handle a lot of pressure and water exposure.

The paste is a two-part component, so you can choose the parts you need for your project. This is very handy, as you can be certain that you’ll get a 100% efficiency.

6. J-B Weld 50172 25 ml. MarineWeld Syringe

Our rating: 8 / 10

J-B Weld 50172 25 ml. MarineWeld Syringe

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Pros:

  • The 25ml syringe of MarineWeld covers virtually all small projects
  • Works in salt and fresh water
  • Comparatively inexpensive
  • Even works underwater
  • Does a great job of filling cracks and voids and holding parts together
  • J-B Weld is famous for its ability to fill voids and hold parts together
  • Versatile epoxy is good for metal clamps, brackets, engine repair, and even penetrates fiberglass
  • Universal epoxy and can be used to glue metal to wood
  • Can withstand temperatures from -45F to 300F
  • Sticks to most surfaces in a wide variety of temperatures and pressure

Cons:

  • Can sometimes have a stinky odor that lingers for several days
  • Has an extended curing time of 36 hours
  • The curing period for MarineWeld is unusually long
  • Often leaves behind drips, and drips paint coverage over finished work
  • It won’t stick to all metallic objects (such as stainless steel)

(2 Pack)

7. Clear Marine Epoxy Resin

Our rating: 8 / 10

Clear Marine Epoxy Resin

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Pros:

  • This epoxy kit includes everything you need for a full application
  • One kit will complete approximately a project of 8-10 linear feet
  • It works well for fiberglass projects both above and below the water surface
  • The resin and hardener are two different bottles because it helps to prevent accidentally curing the resin
  • Provides a strong bond

Cons:

  • This epoxy kit does not include paint or filler
  • Can’t be used with un-cured resin

The OTI clear marine epoxy kit is an extensively reviewed product that we couldn’t leave off our list. It’s one of the few epoxy kits that reviewed across the board for its simple instructions and fantastic results.

This epoxy kit comes with everything you need to coat your fiberglass pieces …including uncoated pieces. It includes two different bottles of resin, a bottle of hardener, plastic paint mixing sticks, skill saw blades, rope and caulk.

If you’re looking to repair a hole in your boat, this is the perfect product for you. It’s even suggested by reviewers for boat owners who own fiberglass boats and need to repair their fiberglass hull.

8. MARINEGUARD 8000

Our rating: 8 / 10

MARINEGUARD 8000

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Pros:

  • Very flexible while curing
  • Good strength
  • Excellent adhesion to fiberglass, metal and wood
  • Easy to apply

Cons:

  • Expensive
  • Can’t be sanded or worked until it’s been cured
  • Poor water resistance

The Marinewise brand’s flagship epoxy is the Marinewise® 8000 Epoxy. A combination of phenolic resin and aliphatic resin is loaded with an extremely tough curing agent. Superior toughness and high impact resistance as well as long-term adhesion make this epoxy an excellent choice for use in a variety of applications. The epoxy has a viscosity of 350 to 900 mPa·s, and is available in 32 oz kit and liquid. The most common applications for this epoxy are the bonding of the following: wood, fiberglass, metal, concrete, plastics, ceramics, and stone. It’s designed to be a hard, high impact resistant epoxy. It will cure to a violet color, and it’s fairly flexible for the first 24 hours. Once cured, it can’t be sanded or worked until it’s fully cured.

9. TotalBoat 5:1 Epoxy Resin Kits

Our rating: 8 / 10

TotalBoat 5:1 Epoxy Resin Kits

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Pros:

  • Very thick and consistent quality
  • Quick, easy to mix, and cohesive when cured
  • Excellent adhesion to wood and fiberglass

Cons:

  • High curing time
  • Not for inexperienced boat builders

Ing, 10-oz. Kit

The TotalBoat epoxy resin has been a workhorse of boat building and repair over the past decade or so. The company’s expertise in resin compounds has led them to produce a 5:1 epoxy resin kit that can be used for all fiberglass and wood boat constructions. The kit comes in two sizes: a 10-ounce and a 32-ounce kit.

Both kits are designed to work with all TotalBoat epoxy hardeners.

10. TotalBoat Clear Penetrating Epoxy Wood Sealer Stabilizer

Our rating: 8 / 10

TotalBoat Clear Penetrating Epoxy Wood Sealer Stabilizer

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Pros:

  • Easy to use (very straight forward)
  • Cures fast
  • Very high quality
  • Worked very well as a sealer

Cons:

  • Minimal tackiness
  • Smells
  • Can be messy
  • Cured/dried very quickly

The TotalBoat is a water based epoxy wood sealer that is tinted blue and works well for the repair and restoration of wood and fiberglass. The epoxy works well to seal and stabilize wood and fiberglass.

When it comes to wood stabilizer, it works by penetrating the wood fibers, filling in the pores as well as reinforcing the repairs. It also increases resin adhesion while reducing shrinkage.

This epoxied wood sealer is perfect for the bottom of boats.

Frequently Asked Questions (FAQ)

What is the best brand of epoxy glue?

If you need to fix something around your boat, there are two kinds of glue that you’ll want to consider. Marine epoxy glue and plastic or vinyl cement.

Marine epoxies are designed specifically to protect against the high level of moisture associated with watercrafts. Marine epoxies are harder and more durable.

If you are working with vinyl or plastic, you will want to use the appropriate glue (plastic or vinyl) which will have fewer applications but will be far cheaper.

What is marine grade epoxy?

Marine epoxy resin is an extremely strong, very specialized type of thick epoxy coating that is used on boats.

In addition to the strength of marine epoxy, it is also very UV-resistant. UV-resistant means that the material is less likely to discolor and breakdown under UV light. The type of UV-resistant epoxy that is on the market right now is specifically designed to be used on boats in outdoor environments.

RIP-TIE Premium Marine Epoxy Fast Cure is a perfect example of this type of marine grade epoxy. This epoxy is designed for use on fiberglass and other marine substrates.

There are a few things you should know about marine grade epoxy:

How long does marine epoxy last?

Five to ten years … if you can call it ‘lasting.’ The truth is that marine epoxy is not going to last forever if you use it underwater.

Marine epoxy is made with the same ingredients as ordinary epoxy and will likely last just as long. That is, if you store it in a dry place and don’t get it wet! Getting it wet is the main problem you need to be aware of. If you use this stuff underwater, it’ll soon begin to break down with the exposure to water.

Is marine epoxy waterproof?

The term waterproof is often thrown around by sellers to describe special coatings on products and materials, yet that term wouldn’t technically be correct in the case of a marine coating.

Coatings, such as epoxy, will be resistant to water but not waterproof. Waterproofing is really a function of the materials and methods used to apply the product as well as the design of the manufacturer.

Conclusion

If you are ready to get into the world of marine modeling, then we highly recommend you go with a marine epoxy. Our research showed us that the brands that have proven to be the best are the ones that have been listed below.

Our Recommendation

NameCategoryProduct
J-B Weld 8272 MarineWeld Marine EpoxyBest OverallJ-B Weld 8272 MarineWeld Marine Epoxy
Loctite 1919324 Marine Epoxy 0.85-Fluid Ounce SyringeBudget PickLoctite 1919324 Marine Epoxy 0.85-Fluid Ounce Syringe
TotalBoat 5:1 Epoxy Resin KitsUpgrade PickTotalBoat 5:1 Epoxy Resin Kits