Description:Caulk 4200-FC Black 10 oz tube Fast-Cure Polyurethane by 3M
A one-part general purpose polyurethane that chemically reacts with moisture to deliver flexible bonds with good adhesion to wood, fiberglass, gelcoat, certain plastics & metals. Paintable & sandable. Forms watertight, weather resistant seals on joints & hardware above or below the waterline. This product is approximately half the strength of 3M 5200, which allows for disassembly of parts.