3M? MARINE ADHESIVE/SEALANT FAST CURE NO. 4200

One part general purpose polyurethane that chemically reacts with moisture to deliver flexible bond with good adhesion to wood, fiberglass, gel coat, most plastics and metals. Sandable, forms watertight, weather-resistant seal on joints and boat hardware above or below waterline. Approx. half the strength of Adhesive/Sealant 5200, allowing for disassembly of parts. Not recommended for sealing wood decks as it may be permanently softened by certain teak cleaners or sealers. Test product on plastics for suitability. Becomes tack free in one hour, fully cures in 24 hours.