Gorilla Waterproof Patch & Seal Tape: Instantly seals out water, air and moisture. With an extra thick adhesive layer and UV resistant backing this tape conforms to form a permanent bond indoors and out. At 4″ wide use it to patch holes, cracks, gaps and tears, even underwater. Excellent for Home, Auto, Marine, camping, RVs, Outdoors and more! 4″ X 10′.