Our Stain Blocking Primer is a fast dry multi-surface primer. Dry to touch in 30 mins, recoat in 1 hour. Can be used over unpainted surfaces, water based or oil based paints. Primer is water-based for easy cleanup. Suitable for sealing wood, and porous surfaces. Blocks stains and tannins. Coverage is approximately 75 square feet per pint. Apply with brush, foam roller or sprayer.