The Cementone Waterproof Tanking Slurry delivers a breathable, waterproof coating engineered for internal brickwork, concrete and stone surfaces. This 25kg grey slurry features a straightforward 2-coat brush application system, requiring only water for mixing. Designed for versatility across demanding waterproofing applications, this WRAS-approved coating performs reliably both above and below ground level. The formulation resists positive and negative water pressure while maintaining essential water vapour permeability. Suitable for cellar walls, retaining walls, subways, tunnels, archways, concrete storage tanks, and wet room installations, this tanking slurry provides robust protection that extends structural service life in moisture-critical environments. Features & Benefits: Breathable waterproof coating for internal masonry and concrete surfaces. Simple water-mix application using 2-coat brush system. WRAS approved for assured quality and safety standards. Resists both positive and negative water pressure while maintaining water vapour permeability. Effective for cellar walls, retaining walls, tunnels, archways, storage tanks, and wet rooms. Suitable for installation above and below ground level. Colour: Grey. Size: 25kg bag.