Water repellent / Masonry Sealer
"Protection for your masonry"
BST Penetrating Water Repellent (BST-PWR) is a clear water-base, low VOC, breathable penetrating SILOANE/SILANE water repellent for dense masonry surfaces - brick, cast, stucco, mortar and stone. BST-PWR penetrates and reacts with minerals within the substrate to create a hydrophobic barrier against water absorption.
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Perfecting the Color of America's Masonry