Zinsser Cover-Stain Interior/Exterior High Hiding Oil-based Wall and Ceiling Primer (Aerosol Spray)Zinsser Cover Stain Oil Based Primer Spray is an all purpose oil based primer designed to provide excellent hiding power indoors and out. Cover Stain has excellent adhesion to dense, glossy surfaces such as enamel paints and varnishes, paneling, laminates and ceramic tile. It blocks satins from nicotine, graffiti, fire, smoke, water and dark colors. This whole house primer sealer is a favorite with professionals. Use it to block stains, hide dark