The Ronseal One Coat Damp Seal permanently blocks damp stains on walls and ceilings. You can even put it onto damp walls. It lets trapped moisture escape without causing anymore damage. When it's dry you can paint or wallpaper over it. BEFO...

Slow-grown untreated sawn timber that has been kiln-dried for enhanced stability and is ideal for interior joinery where its rough finish is concealed.