• Water Blocking Primer/Finish

    Water Blocking Primer/Finish

    Nothing smells worse than a damp, musty environment – like basements. Fortunately, Water Blocking Primer/Finish seals masonry walls, preventing further moisture seepage and inhibits the growth of mildew on the surface. The end result is a uniform, quality finish that reduces odors and blocks moisture.

    Average Customer Rating

      UL 2818

    Sizes ***

    1 Gallon, and 5 Gallons

    Paint Can Wet Paint

    Interior Painting How-To’s

    Information on the steps of a successful painting project: Planning, Preparing, Painting, and Clean-up.

    Learn More

    Paint Can Wet Paint

    Paint Calculator

    Find out how much paint you will need by using our online paint calculator.

    Learn More

    Product Data Sheets

    A Product Data Sheet is available for technical information about this product line. This document includes details such as dry time, surface preparation, coverage area, and other information you would find on the product label.

Not all colors are available in all product lines. See store for details.
Not all sizes available in all areas.
Due to individual computer monitor limitations, colors seen here may not accurately reflect the selected color. To confirm your color choices, visit your neighborhood Sherwin-Williams store and refer to our in-store color cards.