2 Pack, White, Zinsser Block Filling 2X Flat Primer- 293245, Gallon

Tolerates high pH levels (up to 13) in new concrete and masonry May be used on concrete, cinderblock, brick, stucco, fiber cement siding, plaster, mortar, concrete masonry units (CMU), and other cementitious surfaces Provides excellent topcoat protection against concrete salt (efflorescence) damage Features 2X better adhesion and thickness versus competitive primers