An all-purpose, non-corrosive, non-yellowing, mildew resistant, low-odor, 100% high quality silicone sealant. Tack-free in 30 minutes or less. Fully cured in 24 hours. 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 or create black streaks.