Super strong adhesive Flex Tape has a thick rubberized backing. Instantly stops leaks, even under water. Instantly creates a watertight seal to patch, bond, seal, and repair. Excellent for: home repairs and DIY projects, marine and water sports, outdoor and camping gear, automotive and mechanical, industrial and farm equipment. Repairs: roof leaks, downspouts, boats, kayaks, personal watercraft, outdoor equipment, mobile homes, vents, ducts, and more.