Gorilla GWCSB450 Waterproof Coat & Seal Black Spray 450ml offers durable protection, ensuring reliable defense against the elements for various surfaces. It effectively seals out water, air, and moisture, providing robust defense for long-lasting durability and reliability. Suitable for both indoor and outdoor use, it is perfect for roofing, gutters, downpipes, windows/uPVC, external chimneys, and small repairs on caravans. It is not for flashing applications, pipes under pressure, or for use inside a firebox. The Gorilla GWCSB450 Waterproof Coat & Seal Black Spray 450ml is a flexible, weatherproof coating that seals out water, air, and moisture. Perfect for stopping small leaks, this formula seals and protects by easily covering small gaps and cracks to create a heavy-duty, watertight seal. It is durable and versatile, suitable for both interior and exterior use. Once cured, the product is waterproof and temperature resistant. Features: Colour: Black, Finish type: Gloss, Item volume: 450 Millilitres, Special feature: Fade Resistant, UV Resistant, Long lasting.