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! FEATURES 4"x10ft Waterproof Works Underwater Indoor/Outdoor Instantly seals out water, air, and moisture Permanent Bond 2x more tape compared to 5ft flexible tapes