Gorilla Waterproof Coat & Seal 473ml Black Gorilla Waterproof Coat & Seal is a flexible, rubberised coating that seals out water, air and moisture. Perfect for repairing leaks, the liquid is easy to apply you simply brush it, roll it or pour it. The self-levelling formula seals and protects by smoothly covering small gaps and cracks to create a weatherproof, watertight seal. Great for: Roofing, Gutters, Conservatories, Drainage Pipes, Windows, Caravans, External Chimneys Due to geographical locations we are unable to deliver to: Isle of Wight, Isle of Man and Ireland.