GORILLA Waterproof Patch & Seal Tape — Clear 4" x 8' Roll, Permanent Waterproof, UV-Resistant

GORILLA Waterproof Patch & Seal Tape (Clear) is a heavy-duty, permanent adhesive tape that instantly blocks water, air, and moisture for durable indoor and outdoor repairs.

This clear, 4" x 8' roll from GORILLA is formulated with a thick, conforming adhesive and a UV-resistant backing so it bonds to smooth, non-porous surfaces and creates an immediate waterproof barrier. Use it to patch tears, seal gaps, and stop leaks in places where visibility matters—pool liners, clear canopies, windows, and other surfaces where you prefer an invisible fix. It works submerged when applied correctly, but proper surface prep and full contact are crucial for a lasting result.

How should I prepare a surface before applying the tape?

Surface preparation determines how well the tape will adhere and seal. Clean the area thoroughly, remove loose debris, and make sure the patch area is dry and at room temperature whenever possible. For underwater repairs, press out trapped water and apply with firm pressure to eliminate air pockets.

• Clean with mild detergent or isopropyl alcohol and let dry when not underwater
• Cut tape larger than the damaged area to extend beyond all edges
• Remove liner, apply once—tape is not repositionable
• Rub aggressively across the entire surface, focusing on the edges

Where can I use this waterproof tape, and where should I avoid it?

This tape is designed for many common household, marine, and outdoor repairs: roofs, vinyl liners, tents, RVs, and more. It adheres best to smooth, non-porous materials. Avoid using it on seams under pressure, beneath automotive hoods, silicone-treated surfaces, highly porous textures, or for hanging objects where load-bearing is required.

• Good for: pool liners, tarps, plastic, vinyl, canopies, and marine trim
• Not recommended for under-hood automotive parts or pressurized seams
• May not bond to certain silicones, water-repellent fabrics, or some plastics
• Permanent bond can damage substrates if removed

Will the tape hold up to sun, heat, cold, and underwater conditions?

The backing is UV-resistant to slow yellowing, and the adhesive is rated for a wide service temperature range from -70°F to 180°F. It can form a waterproof seal underwater when applied correctly, but prolonged UV exposure, extreme heat, or humidity can alter appearance and long-term performance.

• Temperature range: -70°F to 180°F for operating conditions
• UV-resistant backing reduces yellowing but may still age over time
• Can be applied underwater if all trapped water and air are pressed out
• Not a permanent fix for pressurized leaks or structural failures

How do I apply the tape for the most reliable seal?

Plan your patch so the tape extends beyond the damage on all sides. Cut the piece with the liner on, remove the release liner, center the tape over the repair, and press firmly. Once set, rub the entire surface vigorously—especially the edges—to create maximum contact and a durable seam.

• Cut tape larger than the damaged area before removing the liner
• Place tape carefully; it cannot be repositioned after contact
• Apply strong pressure across the whole patch and burnish the edges
• For underwater patches, press out water and air before final burnishing

Who is this for: GORILLA Waterproof Patch & Seal Tape (Clear) is suited for DIYers, homeowners, boat owners, RV travelers, and outdoor enthusiasts who need a fast, nearly invisible way to stop leaks and repair tears on smooth surfaces. It’s ideal when you want a durable, weather-resistant fix without painting or permanent coverings—but not for pressurized plumbing or critical structural repairs. Read product limitations and test adhesion on an inconspicuous area if you’re unsure about the substrate.