Bitumen Mastic Sealer Flash Harry 1L Waterproof

Flash Harry Bitumen Mastic Sealer is a waterproof, flexible sealing compound designed for metal roofing, guttering, flashing, and general weatherproofing applications. This 1-litre container provides excellent adhesion to metal, concrete, and masonry surfaces, with superior UV and weather resistance for long-term durability. Ideal for roofers, builders, facilities managers, and maintenance professionals requiring a reliable, quick-setting mastic sealant.