Bostik Flexacryl Instant Repair Waterproof Roof Coating is a highly effective solution for instant and long-lasting roof repairs. This black, 5 KG roof coating is specifically designed to provide an immediate waterproof seal, even in wet conditions. Its easy to apply and adheres to almost all roofing materials. Its flexible nature helps it withstand natural building movements, while its excellent weathering properties ensure durability in extreme weather conditions. Bostik Flexacryl is also resistant to UV rays, preventing it from degrading over time.