Rustins One Coat Damp Seal - Rustins DAMS500, This 500ml tin of damp seal from Rustins is a fast drying, high performance interior paint which permanently covers damp, water stains and most household stains. It dries with a long-lasting permanent seal over damp walls and ceilings and can be over coated with gloss or emulsion paint, as well as wallpaper. It does not cure the damp, but is specially formulated to allow trapped moisture to escape over time, so preventing flaking of the paint or peeling of wallpaper. Rustins DAMS500 One Coat Damp Seal 500ml