GORILLA Waterproofing Tape, White 4" x 3 m — Permanent Extra-Thick, UV-Resistant Seal

GORILLA Waterproofing Tape is a heavy-duty, white permanent patch tape that instantly seals out water, air and moisture on a wide range of surfaces.

This extra-thick, UV-resistant tape is made to conform to uneven surfaces and create a long-lasting bond indoors, outdoors and even underwater. At 4 inches wide and 10 feet long, it’s sized for common repairs — from a leaky gutter to a torn pool liner — and adheres to materials like metal, plastic, vinyl, glass, rubber, wood and more. The product performs across a wide temperature range and is formulated for weather resistance, though it requires clean, smooth, non-porous surfaces for best results.

How does this tape stop leaks and gaps?

The tape uses a thick, aggressively tacky adhesive plus a flexible, UV-resistant backing to form an immediate waterproof barrier. It conforms to surface contours and seals out moisture and air when pressed firmly in place, creating a permanent repair on compatible substrates.

• Extra-thick adhesive layer for strong initial tack
• UV-resistant backing that resists yellowing and weathering
• Works on many materials: metal, glass, vinyl, plastic, rubber, wood
• Seals in wet conditions and can be applied underwater when pressed firmly

What surfaces and conditions will it work on?

This tape is formulated for non-porous, clean, and relatively smooth surfaces. It adheres well to common household and outdoor materials but may not bond to silicone-coated or water-repellent finishes and should not be used where seams are under pressure.

• Best on aluminum, steel, acrylic, glass, vinyl, and many plastics
• Able to be applied in hot, cold, wet, or dry environments
• Not recommended for silicone surfaces or sealed, water-repellent coatings
• Avoid use on seams under pressure or automotive engine compartments

How do I apply the tape for a reliable repair?

Prepare the area by cleaning and removing loose debris; the tape bonds most reliably to clean, room-temperature surfaces. Cut a piece larger than the damage, remove the release liner, lay the tape down once (it cannot be repositioned), and press firmly while rubbing the entire surface—pay special attention to the edges.

• Cut tape larger than the repair area; extend beyond all edges
• Remove liner, place once—do not reposition after contact
• Rub the entire surface aggressively to activate the bond
• Press out trapped water under the tape when applying underwater

What performance limits and storage tips should I know?

GORILLA Waterproofing Tape handles a wide service range but has limits: it’s not for pressurized seams or certain automotive uses and may damage paint if removed. Store the roll at room temperature and keep it on the top/bottom discs to minimize edge stickiness.

• Service temperature range: -70°F to 200°F (performance depends on surface)
• Not intended for seams under pressure or under-hood automotive repairs
• Permanent bond—removal can damage surfaces or paint
• Store at room temperature on the roll discs to reduce edge tackiness

Who is this for: GORILLA Waterproofing Tape is for homeowners, RV and boat owners, campers, and DIYers who need a quick, heavy-duty patch for leaks, holes or tears across a variety of materials and environments. It’s ideal when you need an easy-to-apply, weather-resistant, and durable patch—just be sure the substrate is compatible and prepared for the best, longest-lasting result.