Star brite Silicone Sealant&mdash Bonds fiberglass, plastic, wood, glass and metal. Unaffected by sunlight, weathering, most chemicals, solvents. Will not shrink or sag. Stays flexible from -70&deg to 480&deg F. Use above and below waterline. Easy-to-use applicator. Free applicator gun with each tube. 3-oz. Tube: Black.