The Ronseal Thompsons Emergency Roof Repair Mastic is a professional-grade trowel applied mastic designed for emergency roof repairs and waterproofing applications. Developed using technology from North Sea oil rigs, this high-performance sealant offers exceptional adhesion to virtually any roofing material, even when applied underwater. This emergency roof repair mastic features a hydrophobic formula that actively repels and displaces water during and after application, instantly forming a watertight seal without requiring curing time. The mastic contains added fibres and a high solids content, making it ideal for filling, plugging and repairing cracks and splits whilst targeting leaks directly at their source. The all-weather formulation makes this roof repair mastic suitable for use on flashings, gutters, roof lights and valleys. Its ability to adhere to materials underwater provides tradespeople with a reliable solution for urgent repairs in challenging weather conditions. Coverage is approximately 0.17m² per litre, allowing for effective leak repair on various roofing applications. Features and Benefits: • Hydrophobic formula instantly forms watertight seal with no curing time required • Adheres to virtually any roofing material, even underwater • Contains added fibres and high solids content for superior crack and split repair • Developed from North Sea oil rig technology for extreme weather performance • Suitable for multiple applications including flashings, gutters and roof lights Specifications: Seal Type: Roof Repair Size (L): 0.750 Colour: Black