CLEVELAND (July 10, 2018)—Sherwin-Williams introduces Extreme BlockPrimer/Sealer, a versatile indoor/outdoor formula, to its extensive coatings lineup. The new oil-based primer reduces the need for repaints by sealing off stubborn stains such as smoke, fire and nicotine, making it ideal for quickly restoring a property to fresh condition.

Sherwin-Williams introduces Extreme Block™ stain blocking Primer/Sealer“Extreme Block joins other recently introduced coatings, such as Extreme Cover™ Stain Blocking Paint and Primer in One, as a key product in the property management and residential repaint toolkit,” said Steve Revnew, senior vice president of product innovation, Sherwin-Williams. “The fast-drying formula and powerful stain-blocking properties make it a great option for multifamily property managers, facility maintenance crews and other professionals looking to save time and maximize results.”

This fast-drying primer can be top-coated with either acrylic or alkyd products in as little as two hours and adheres well to multiple substrates including wood, drywall, masonry and prepared metal. Extreme Block is easy to sand to a uniform surface and provides lasting adhesion through deep surface penetration.

Now available, Extreme Block Stain Blocking Interior/Exterior Alkyd Primer/Sealer can be purchased in Sherwin-Williams stores nationwide. For more information, visit