This multi-purpose problem solving primer is formulated to cover a whole range of surfaces and surface problems. It seals difficult stains caused by water or mould and provides excellent adhesion to a range of surfaces. Covers most stains including nicotine, water, adhesive residues, soot, and wood tannins. Works on ceramic tiles, most plastics, MDF, and wood. For use under most finishes including emulsion, gloss, and lightweight wallpapers.