Sherwin-Williams’ newest coating, Extreme Block Primer/Sealer, is designed to quickly seal off tough surface stains, including fire, smoke, and nicotine, on both interior and exterior surfaces. The oil-based primer adheres to multiple substrates, including wood, drywall, masonry, and prepared metal, and is easy to sand to a uniform surface, according to the manufacturer. Primed surfaces may be top-coated with either acrylic or alkyd coatings after as little as two hours of drying. Prices run around $42 a gallon. sherwin-williams.com
Supreme Sealer
