KILZ 2 ALL-PURPOSE Primer is a fast drying, water-based, multi-surface primer-sealer-stainblocker with excellent adhesion, mildew resistance, sealing properties and very mild odor. KILZ 2 ALL-PURPOSE Primer blocks medium stains including minor water stains, rust, grease, ink, pencil and felt marker. Enhanced hiding makes it ideal for changing colors and helps lessen the number of coats of paint required. Use on interior and exterior surfaces including woodwork, drywall, plaster, paneling, masonry, brick, painted metal and properly prepared glossy surfaces. Use under or over water-based or oil-based paints. Not recommended on flooring.