Zinsser 293248 Block Filler 2X High Build Primer for Concrete, 5 Gallon, White

Zinsser 5 gal. Block Filler Primer is a high-build acrylic primer designed for interior and exterior residential, commercial and industrial use. With twice the thickness of other primers, it fills pinholes and seal voids in surfaces providing a smoother and more uniform topcoat. Block Filler 2X high hiding formula seals semi-porous surfaces to provide better topcoat coverage and consistent sheen without pin holing.

• Use on interior and exterior surfaces like concrete, cinderblock, brick, stucco, fiber cement siding, plaster, mortar, concrete masonry units and more to fill and smooth surfaces prior to applying topcoats units
• Covers up to 500 sq. ft. depending on application method and surface porosity
• Flat white finish is a high-hiding formula
• Provides excellent alkali resistance and eliminates concrete salt damage on top coats