Ronseal 36961 One Coat Stain Block White 2.5 Litre RSLOCSBW25L

Can be used before painting to permanently block stains from showing through.
Covers nicotine, crayon, grease and much more.
Permanently blocks stains in 1 coat and is ready to paint over in 4 hours.
Coverage: 8m² Per litre.
Usage Areas: All interior walls and ceilings.
Compatibility: Bare or previously painted walls and ceilings.