3M Marine Adhesive Sealant 5200, White, 295 ml POWERFUL MARINE SEALANT: A permanent solution for bonding marine substrates like wood, fiberglass, and metal. VERSATILE 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: Its elastomeric bond absorbs the stress of vibration, swelling, shrinking, and shock. LONG WORKING TIME: Allows plenty of working time, achieving handling strength in 48 hours 6500