Earthborn isolating stain block primer treats stubborn dry stains before painting over them with water based paints. It is a good primer for fibre products and also stops stains from bleeding through the new paintwork. It works well on dry water stains, nicotine, fat and other dry stains. It is a matt white paint that contains a stain inhibitor, and is ideal for treating stains including crayon, graffiti, water stains, creosote, smoke stains, hand marks, asphalt etc. helping to prevent them from bleeding through the new paintwork.