Polycell Stain Stop is a highly pigmented paint which permanently prevents stains reappearing through paint. It provides one coat coverage over water stains, grease, nicotine, crayons, rust and soot. Suitable for use on plaster, concrete, stone, masonry, plasterboard and wood. Permanently prevents existing stains reappearing through paint. One coat coverage for water stains, grease, nicotine, crayons, rust and soot. Also available in an aerosol for spray application.