Perm-A-Barrier W.B. Primer - 1 Gallon

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Quick ID: Q822
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Grace Perm-A-Barrier WB Primer is a water-based primer that provides a strong, high tack finish on the treated substrate. It is specifically designed to work in combination with and attach Perm-A-Barrier Flashings, Perm-A-Barrier Detail Membrane and Perm-A-Barrier Wall Membrane to various substrate including glass-mat faced gypsum sheathing. Grace Perm-A-Barrier is nonflammable. The VOC content is 10g/L and meets the U.S. EPA Volatile Organic Compound Emission Standard for Architectural Coatings.


  • Excellent adhesion
  • Fast and easy application by brush or roller
  • Aggressive tack - will provide bond to difficult substrates such as glass faced wall boards
  • Fast drying
  • Low odor
  • VOC compliant - 10 g/L content


Manufacturer Part Number46509
Sub BrandGCP Applied Technologies
Compatible MaterialsFaciltates Adhesion of Grace Construction Products Flashing, Detail Membranes, and Wall Membranes to Various Subtrate including Glass-Mat Faced Gypsum Sheathing
Coverage - Square Feet250-350/gallon
Installation MethodA moderately thick coating should be applied and rolled out evenly. A properly applied coating will have uniform coverage and leave a tacky finish to the surface when dry.
Installation Tools RequiredSynthetic, 1/2 in (13 mm), nap roller
Package Quantity1
StorageAbove freezing
V.O.C10 g/L
Ships to HI/AKNo