An all-purpose, non-corrosive, non-yellowing, mildew resistant, low-odor, 100% marine high quality silicone sealant. Tack-free in 30 minutes or less. Fully cures in 24 hours (subject to atmospheric conditions). For use above or below the waterline. Will not shrink, crack or dry out. Superior flexibility and adhesion to fiberglass, plastic, metal, and wood. Retains flexibility and tensile strength even after years of exposure. Acid free cure will not corrode metal.