Sentinel Mold & Mildew Resistant Waterproofing Sealant is a 100% acrylic water based antimicrobial coating formulated to stop water penetration through masonry materials. For interior and exterior, above or below grade, vertical applications. Sentinel Mold & Mildew Resistant Waterproofing Sealant withstands 35 PSI of water pressure preventing moisture transmission into basements, crawlspaces, and cellars. The multi-coat application process will self-prime and seal concrete and cinder blocks, masonry walls, stucco, and brick. Sentinel Mold & Mildew Resistant Waterproofing Sealant’s fungistatic agent resists mold and mildew growth on the dried coating surface.