Waterproof Patch & Seal Tape - Black | Grgpst3 Waterproof Works underwater Indoor and outdoor use Permanent bond Instant seal Size: 100mm x 3m Gorilla Waterproof Patch & Seal Tape 100Mm X 3 Metre - Black | Grgpst3 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!