Is masonry treated with DRY-BLOCK breathable?
DRY-BLOCK is a liquid polymeric water-repellent admixture that is mixed throughout the concrete during manufacture of the concrete masonry unit and mixing process of the mortar. It “coats” the masonry pores but does not block them. DRY-BLOCK does not form an “impervious film”. Masonry treated with DRY-BLOCK remains breathable and will not act as a vapor barrier.