Are you looking for a way to waterproof concrete surfaces permanently? KING Xypex high'n dry is a surface-applied chemical for waterproofing. This premium quality, non-soluble, treatment is ideal for waterproofing basement walls, foundations, pools and cisterns. Designed for interior or exterior application, crystalline growth to prevent water seepage due to hydrostatic pressure. Easy to apply, 1 kg (2.2 lb) covers approximately 1.25 m² (13 ft²).