Roof Repair Compound – Waterproof – ExteriorProduct Overview The High Performance Roof Repair Compound in grey is available in a 2. 5kg one coat format, designed to provide instant waterproofing on a variety of common roofing substrates. Its resin based, fiber reinforced formula allows for application even in wet conditions, ensuring leaks are sealed immediately without the need for dry surfaces. The compound features high fiber reinforcement, which bridges small cracks and forms a continuous,