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Thompsons Damp Seal White (Assorted Types)Our Stain Block Damp Seal is tough on damp. It’ll permanently seal and remove damp stains and is over paintable in just 4 hours.250mlHigh performance interior seal developed to form a breathable, obliterating membrane thatSeals and permanently stops the reappearance of damp, water and other household stainsSuitable for application to both dry and damp walls and ceilingsMicro-porous formulation allows trapped moisture to evaporate to prevent paint flaking or wallpaper peeling offFull coverage can be achieved in just one coat, ensuring the surface is prepared for decoration in as little as 4 hours.750mlHigh performance interior sealSeals and permanently stops the reappearance of damp, water and other household stainsSuitable for application to both dry and damp walls and ceilingsMicro-porous formulation allows trapped moisture to evaporate to prevent paint flaking or wallpaper peeling offFull coverage can be achieved in just one coat,Surface is ready to bedecorated in as little as 4 hours