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A 3M 5200 underwater sealant will seal seams, fittings, housing, and portholes below the water-line, as well as on boat hulls, decks, and fittings. A crack in the deck, hull, or stem joint of your boat can be repaired with this material, and the results are excellent.
Boat caulking helps hardwares above the deck and serves as marine sealant below waterline. The right marine caulking sealant relieves challenging work on a boat. The silicone blends and new epoxy types work for plastic and painted surfaces and above the waterline.
Compressing the sealant ensures a watertight bond, even if the sealant does lose its hold. Visit West Marine and learn how to choose the right caulk or sealant for the job based on types, materials being used, curing times and much more.
Before reaching for the OTC analgesic, consider what you’re trying to bond or seal, and select the right product based on its properties. Polyurethanes, like 3M 5200, are best for hardware above and below the waterline, like cleats and prop struts, with little need for removal in the future.
This is a fast-cure (one-day), one-component polyurethane structural adhesive/sealant, suitable for above or below the waterline. It stays flexible, allowing for structural movement: stress caused by shock, vibration, swelling or shrinking is effectively absorbed.
1. 3M Marine Adhesive Sealat 5200. If you are unable to find the definite answer to which marine sealant is best, your search has just ended. The 3M marine sealant 5200 is the perfect fit. Its users term it as the “most trusted sealant” for more than 50 years now. It is the gap-filling polyurethane most suitable for wood gel coat and fiberglass.
It can be used below the waterline and is good for thru-hull fittings and fixing deck hardware. Two part polysulfide sealant is used to caulk teak decks. Polyurethane – the adhesive
Polyurethane sealants create strong, waterproof bonds on fittings such as metal thru-hulls, anchor rollers, chain plates, tower mounts, etc. Use it anyplace that a strong, permanent waterproof seal is required.
3M 4000 is a multi-purpose adhesive and sealant for marine applications. Its hybrid polymer formula offers excellent flexibility, ensuring durable, waterproof seals on multiple substrates. It is ideal for use above and below the waterline because of its strong adhesive properties and resistance to weathering and saltwater.
categories. boat maintenance. marine caulking & adhesives. marine adhesives & sealants. CONTACT WEST MARINE. Live Chat. Store Locator. Shop marine adhesives and sealants at West Marine including silicone, polyurethane sealants and adhesives and more. Get free shipping to home or in-store!