Introducing the 4000 / 4200 Marine Adhesive Sealant Fast Cure, your go-to solution for professional-grade, semi-permanent sealing in marine environments. This polyurethane-based formula creates watertight bonds on fiberglass, gelcoat, and wood, making it perfect for deck fittings, through-hull fastenings, railings, and more. Unlike most polyurethane sealant, marine caulking for boats, boat sealant waterproof, waterproof epoxy sealant, silicone adhesive sealant, marine sealant 4200, underwater adhesive, adhesive sealant waterproof, marine sealant black, marine caulking sealant, adhesive silicone in the market, ours is designed to cure within 24 hours. This versatile sealant offers medium-strength bonding, which is still strong but allows for some flexibility and easier disassembly of parts if needed. It is formulated to resist weathering, saltwater, and temperature fluctuations, ensuring reliable performance in any marine setting. Its flexible nature allows for bonding dissimilar materials without compromising strength, making it perfect for a wide range of boat repair and maintenance projects. The 10 oz cartridge packaging ensures easy application, whether you're a professional marine technician or a DIY enthusiast. Upgrade your boat's sealing capabilities with confidence today.