Bond It Stain Block 400ml Aerosol Spray Paint Covers Water Rust Mould Marks Stainblock Off White 400 ml Aerosol Painting Rust Stains Description: A xylene and lead free, high performance, fast drying, pigmented solvent based permanent stain blocking coating. CFC Free Uses For use prior to redecoration on spot marking, water marks and stubborn stains. Suitable for interior use on most building surfaces including brick, plaster, paint and wood. We recommend the product be tested on a small inconspicuous area prior to application to determine suitability. When correctly applied STAIN BLOCK produces a fast drying, stain block coating ready for redecoration. Preparation Ensure all surfaces are clean, dry and free from grease or oil or any other contaminants that may .