Mapeproof Swell is a one-component hydrophilic paste designed for repair and waterproofing tasks. It can be applied to damp or uneven surfaces and is effective at any temperature, even when water is infiltrating or seeping through. Upon contact with water, Mapeproof Swell expands in volume and can withstand significant hydrostatic pressure when properly confined. It adheres well to slightly damp surfaces, provided they are clean and stable. This single-component hydro-expansive paste is supplied in cartridges and is specifically formulated to create flexible, waterproof seals in crac