This interior and exterior primer is specially formulated to be a sound undercoat for paint and will help enhance the topcoat’s performance. It has excellent adhesion to both interior and exterior surfaces including masonry, metal and excellent penetration for bare wood. KILZ ORIGINAL INTERIOR/EXTERIOR is a fast drying sealer that blocks most severe stains including tannin bleed, graffiti, smoke, fire and water stains as well as sealing pet, smoke and food odors. Use on interior and exterior surfaces including wood, drywall, plaster, brick, masonry, stucco, interior siding and paneling, metal and properly prepared glossy surfaces