Bostik BLACK,Roof Emergency One Coat Repair paint Immediate Waterproofing 1kgBostik Emergency Roof Repairis ideal for repairing cracked or leaking roofs.It is a flexible ,fibre reinforced roof coating,which weatherproofs most conventional roof substrates.It can be applied to dry or damp roof surfaces.It has excellent crack bridging properties and cures to a water impermeable coating with excellent adhesion to most building materials and conventional roofing substrates such as old roofing felt,asphalt,bituminous roof coatings,cement and brickwork.- Immediate waterproofer - For wet or dry surfaces - Contains fibres to bridge gaps