3M Marine Adhesive Sealant 5200

3M Marine Adhesive Sealant 5200 is an industry-standard, high-strength polyurethane sealant designed for permanent bonding and waterproof sealing in demanding marine environments. Known for its exceptional durability and flexibility, it creates a long-lasting bond that withstands constant water exposure, vibration, and harsh weather conditions. Perfect for boat construction, deck fittings, hull repairs, and underwater hardware, this adhesive forms a resilient seal that remains secure under extreme stress and movement. Once cured, it delivers a flexible yet tough bond that resists saltwater, fuel, and oil—ideal for both above- and below-waterline applications. The slow-curing formula allows ample working time for precise adjustments and professional installation. 3M Marine 5200 adheres to wood, fiberglass, gelcoat, metal, and plastic surfaces with exceptional strength, eliminating leaks and ensuring structural integrity. Trusted by boat builders, repair technicians, and DIYers worldwide, this adhesive sealant provides unmatched reliability, weatherproofing, and performance for all marine and industrial sealing needs.