Flash Harry One Shot is a durable acrylic and membrane waterproofing system designed for long-lasting protection on pitched roofs and exterior roofing details. Formulated for use on iron and tiled roof applications, this trusted waterproofing solution delivers excellent adhesion, flexibility, and weather resistance for South African conditions.
Designed to be used together with a waterproofing membrane, One Shot creates a strong waterproof barrier around roof screws, flashings, parapets, skylights, roof ridges, and joints prone to leaks. Its easy-to-apply acrylic formulation makes it ideal for both DIY and professional waterproofing projects.
