A unique combination of marine silicone and polyurethane, formulated especially for fiberglass. LifeSeal offers a fast-curing, low odor, high adhesion, non-sagging, non-corrosive, non-yellowing formula. It provides a durable permanent watertight seal for joints subject to structural movement. May be used above and below the waterline. Use for sealing decks to hulls, thru-hull fittings, vinyl ports, sealing/glazing windshields and bedding marine hardware. Will adhere to metal, glass, wood, Lexan, ABS and certain other materials. Can be removed without damaging gel-coat. Not recommended for ferro cement hulls, impregnated wood or oil-soaked materials. Cures in presence of water. Mildew resistant and acid free. Custom colors available. Fast-curing, low odor, high adhesion, non-sagging, non-corrosive, non-yellowing formula Permanent watertight seal for joints subject to structural movement Adheres to metal, glass, wood, Lexan, ABS and certain other materials Not recommended for ferro cement hulls, impregnated wood or oil-soaked materials