A high performance seal for sealing and covering damp, water and other household stains in one coat. Micro-porous formulation allows trapped moisture to escape. Can be applied directly to damp surfaces and permanently stops the reappearance of stains. The one coat formulation – allows the surface to be decorated in 4 hours. Coverage to 7m²/L depending on the porosity of the substrate.Allow 4 hours between each coat. After the second coat, leave for a further 4 hours before decorating.The Thompson\'s RSLTOCDS250 is supplied in a tin with re-sealable lid. 250ml.