KILZ 2 ALL-PURPOSE Primer is a fast-drying, water-based, multi-surface primer-sealer-stain blocker 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 under or over water-based or oil-based paints. It is not recommended on floorings.