A unique combination of marine silicone and polyurethane, formulated especially for fiberglass. Life Seal® 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 tenaciously to metal, glass, wood, Lexan, ABS, and other materials. Can be removed without damaging gelcoat. Not recommended for ferro cement hulls, impregnated wood or oil-soaked materials.