Zinsser Cover Stain 13 oz. Oil Base White Interior/Exterior Primer and Sealer (Case of 6) spray sticks to any surface without sanding and can be used under and over oil and latex topcoats. It features an oil-based formula that seals stains from water, smoke, fire, nicotine and tannin bleed. Excellent stain killer and bond coat, dries to the touch in just 30 minutes.