What is the best marine glue?

Finding glue for marine applications can be tough because you need something that can survive and thrive when submerged in both fresh and salt water, hot and cold conditions. Marine glues are tested by the elements probably more than any other glues, so choosing the best ones is crucial. Here are the best marine glues.

Table of Contents

Bestseller No. 1
J-B Weld 50172 25 ml. MarineWeld Syringe
  • J-B WELD MARINEWELD: A specially formulated two part adhesive & sealant that provides a strong and flexible bond that is waterproof, and chemical & UV resistant. J-B Weld MarineWeld comes in a syringe allowing for an easy 1:1 mix ratio
SaleBestseller No. 2
3M Marine Adhesive Sealant Fast Cure 5200 (06535) Permanent Bonding and Sealing for Boats and RVs Above and Below the Waterline Waterproof Repair, White, 1 fl oz Tube
  • MULTI-SURFACE SEALANT: A permanent solution for bonding marine substrates like wood, fiberglass, and metal
  • VERSATILE MARINE APPLICATIONS: Tough yet flexible polyurethane polymer is ideal for deck housings, hull fittings, porthole mounting, fiberglass transoms, and underside molding
  • WARD OFF WATER: Resists saltwater and weathering both above and below the water line
  • FLEXIBLE BONDS: The flexible elastomeric bond absorbs the stress of vibration, swelling, shrinking, and shock
  • FAST CURE: Tack-free in 1-2 hours, fully cures within 48 hours
Bestseller No. 3
Waterproof Polyurethane Glue 20.3 fl oz. Bottle Marine Glue for Boats and RVs Natural PU Adhesive for Above and Below The Waterline (1 Pack)
  • Marine waterproof sealant : 100% waterproof. Extreme heat, cold, and water have no effect on glue, ideal for indoor and outdoor repairs.
  • Versatile performance : Your solution for almost any project or repair a wood, picture frames, toys, crafts, brick, metal, cement, ceramics, foam, glass, concrete, etc.
  • Easy to use & Apply : Roughen up the shiny surfaces, glass, some plastics and metals. Then clean the surfaces and moisturize surface spraying with water.
  • Fix & Repairs : Fills small gaps on joints. No runs in vertical surfaces and construction. Dried glue is stainable, paintable and sandable boat construction sealant.
  • Solvent free : Original polyurethane strong marine adhesive, requires no mixing, for better results allow cure completely in 1 day.
Bestseller No. 4
Permatex 84200 Underwater Marine Epoxy
  • Flexible water-proof adhesive
  • Sticks and cures underwater
  • Shock and vibration resistant
  • Sets in 15 minutes/ cures in 1 hour with up to 4000 psi strength
  • Bonds to: fiberglass, pvc, metal, wood plastics and more
SaleBestseller No. 5
Loctite PL Marine Fast Cure Adhesive Sealants, Waterproof Construction Glue for Fiberglass, Vinyl, Glass & More - 10 fl oz Cartridge, Pack of 1
  • Item Package Dimension: 11.14L x 1.77W x 1.69H inches
  • Item Package Weight - 1.1 Pounds
  • Item Package Quantity - 1
  • Product Type - BONDING ADHESIVES
  • Through hull fastening, deck fittings, deck to hull joints, portlights, moldings, struts and planking, and stem joints.
Overall, the best marine glue is 3M Marine Adhesive Sealant. 3M Marine Adhesive Sealant is the best marine glue because of its versatility. It can be used both above and below the waterline and can be used for both interiors and exteriors of boats. 3M Marine Adhesive Sealant has a long-lasting formula that is resistant to both water and weathering and it stays flexible after fully curing, with no cracking or peeling whatsoever.

Best Solvent-Free Marine Glue

If you need a marine glue that is solvent-free then get your hands on Loctite PL Marine Fast Cure Adhesive Sealant. Watertight and flexible when dry, Loctite PL Marine Fast Cure Adhesive Sealant is a great marine glue that works best on deck fittings and through-hull fastening. Loctite PL Marine Fast Cure Adhesive Sealant sets within several minutes and takes just 24 hours to fully cure. Once it is fully cured, Loctite PL Marine Fast Cure Adhesive Sealant can be put either above or below the waterline.

How to Seal a Leak in a Boat

Best Long-Lasting Marine Glue

For an excellent and long-lasting marine glue, look no further than 3M Marine Adhesive Sealant. 3M Marine Adhesive Sealant can take up to a week to fully cure, but the wait is worth it because it will last years without cracking, peeling, or shrinking, 3M Marine Adhesive Sealant can be used above or below the waterline and is also completely weatherproof.

Beat Marine Glue to Resist Saltwater Deterioration

If you are in the market for a marine glue that is completely resistant to saltwater deterioration, then get your hands on Sikaflex-291. Sikaflex-291 resists deterioration in not only saltwater but freshwater, sewage water, diluted acids, limewater, and is even temporarily resistant to mineral oils and fuels. Sikaflex-291 is the perfect marine glue for those vessels that spend long periods of time in the water, no matter what kind of water that is.
The best overall marine glue is 3M Marine Adhesive Sealant. The best solvent-free marine glue is Loctite PL Marine Fast Cure Adhesive Sealant. The best long-lasting marine adhesive is 3M Marine Adhesive Sealant. And the best marine glue for resisting saltwater deterioration is Sikaflex-291.
Technically yes, marine glues can be used for other applications, but it really is not advised. Marine glues are specifically designed for marine applications so that is where their bond will always be the strongest.
Yes, 3M Marine Adhesive Sealant will work on kayaks, but once it is fully cured it is not removable.
No, Loctite PL Marine Fast Cure Adhesive Sealant both applies and dries white.
Yes, you will need to use a caulk gun in order to apply 3M Marine Adhesive Sealant.
No, Sikaflex-291 is not designed to be UV-resistant, but if it is continuously submerged in saltwater, you won’t need to worry about UV damage.

Looking for the best marine glue?