A unique combination of 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. Will adhere to metal, glass, wood, Lexan®, ABS® and certain other materials. Not recommended for impregnated wood or oil-soaked materials. Cures in presence of water. Mildew resistant and acid free. Excellent UV resistance. Custom colors available.