Flash Harry Drip Stop is a high-flexibility rubberised bitumen waterproofing compound designed for long-lasting protection against water penetration and harsh weather conditions. This non-toxic, water-based waterproofing system forms a durable waterproof barrier when used together with a waterproofing membrane, making it ideal for roofs, foundation walls, reservoirs, fish ponds, and water-retaining structures.
 
Its advanced rubberised formulation offers excellent flexibility and resistance to swelling or re-emulsification once fully cured, helping deliver reliable waterproofing performance on both flat and pitched roofing applications.