This is a 1-gallon can of KILZ Original Oil-Based Primer, Sealer, and Stainblocker for interior surfaces. Covers approximately 300 square feet. A good primer makes paint stick better to surfaces, makes paint color truer, and lets you use less paint. It covers existing stains and odors, and helps block new stains and odors and prevent mildew. KILZ Original oil-based primer blocks most stains including water, smoke, tannin, ink, pencil, felt marker and grease. This primer also effectively seals pet and smoke odors. Use this versatile primer on interior surfaces including wood, drywall, plaster, paneling, wallpaper, masonry, brick, painted metal and properly prepared glossy surfaces. For tougher jobs, look at KILZ Max. Dries to touch in 30 minutes. Recoat after one hour.