3M 4200 White Marine Adhesive – 3 oz High-Strength Waterproof Sealant

Secure marine components effectively with 3M 4200 White Marine Adhesive, a premium one-part polyurethane sealant designed for flexible, waterproof bonding. This 3 oz tube delivers a durable seal ideal for bonding boat hulls, decks, windows, and hardware. Offering excellent adhesion to fiberglass, wood, metal, and gelcoat, 4200 ensures long-lasting performance in harsh marine environments. Unlike permanent adhesives, 3M 4200 remains flexible, allowing for structural movement without cracking or breaking the seal. Its resistance to saltwater, weather, and vibration makes it the trusted choice for boat builders, repair shops, and marine enthusiasts seeking reliable sealing and bonding in a convenient small-size package.