ALLPRIME™ Zinsser Quart Cover Stain Oil-Base Interior/Exterior Classic sticks to any surface without sanding. Exceptional stain killing power, its oil-based formula effectively seals stains from water, smoke, fire, nicotine and blocks tanning bleed. It offers excellent flexibility and adhesion. Dries to touch in 2 hours. Covers up to 400 sq. ft. per gallon depending on surface porosity and application method. Flat white finish.