KILZ® original primer is a powerful stain blocking formula that blocks most heavy interior stains including water, smoke, tannin, ink, pencil, felt marker, grease and also seals pet, food and smoke odors. This convenient aerosol is ideal for small paint projects and spot priming interior surfaces including wood, drywall, plaster, paneling, wallpaper, masonry, brick, painted metal and properly prepared glossy surfaces. Not recommended for mold or mildew-prone surfaces or flooring.