Polycell One Coat Stain Stop is a highly pigmented paint which permanently prevents existing stains reappearing through paint. It provides one coat coverage over water stains, grease, nicotine, crayons, rust and soot. Specially formulated to cover grease, pen, nicotine, crayons, rust, soot and dry water stains on interior walls and ceilings in just one coat. Solvent based paint. High VOC content. WARNING Extremely flammable. Dangerous for the environment. Toxic to aquatic organisms. Keep out of reach of children. Always read instructions.