• Water Blocking Primer

    H&C® Basement & Masonry Waterproofer is a thick, textured coating ideal for interior or exterior surfaces, above or below grade. It withstands hydrostatic water pressure up to 10 psi, more than double what the industry requires. Tintable up to 2 ounces of colorant to fit your decorative needs! It not only stops unsightly water stains, this product is also easy to clean up with just soap and water.

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    • Options


      • 5 Gallon(s)
      • White

      Pricing currently unavailable. Please contact Your Local Store:
      Seattle-Ballard 8079


    All prices displayed are for U.S. Sherwin-Williams locations and are in U.S. Dollars. Prices do not include taxes or other fees as applicable.

    Why You'll Love It

    • Interior or exterior use
    • Twice the level of protection required by industry standards
    • Excellent sealing properties against hydrostatic water pressure
    • No thinning necessary
    • Can be topcoated with any latex paint
    • For vertical surfaces only


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    Exterior Painting How-To’s

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

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    Color Selection Tools

    We have many tools to help you find the perfect color for your project.

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    Paint Calculator

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

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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.