Johnstone's Stain Block Primer : - is suitable to contain unsightly stains caused by nicotine, smoke, marker pen, wax crayon, graffiti, tannin and bitumen. It provides a tough durable matt coating which prevents stains bleeding through from the substrate. Stain Block will not prevent stains caused by water damage unless the fault has been eradicated, and the substrate allowed to dry. Can be overcoated with water based emulsions. Please download the manufacturer's data sheet for full details.
Datasheet
