Polycell One Coat Stain Stop is a highly pigmented stain block aerosol paint which permanently prevents existing stains reappearing through paint. It provides one coat coverage over water stains, grease, nicotine, crayons, rust and soot. Permanently prevents existing stains reappearing through paint. One coat coverage for water stains, grease, nicotine, crayons, rust and soot. Also available in a paint for brush application.