Leak seal crack repair tape, waterproof water tape excellent for: roof leaks, gutters, down spouts, boats, kayaks, personal water crafts, canoes, outdoor equipment, mobile homes, rvs & campers; pvc & plumbing pipes, sprinkler systems, pools and spas, windows, doors, walls, seams, vents, air ducts,hvac s creates a super strong waterproof seal, diy projects and so much more! black rubberized sealant tape super strong waterproof.