LOXON Water Blocking Primer/Finish

Description

Defend interior and exterior bare masonry walls against severe ground moisture and water intrusion with Sherwin-Williams LOXON Water Blocking Primer/Finish. This heavy-bodied, high-performance acrylic coating is engineered to withstand hydrostatic water pressure, making it a reliable solution for sealing interior basement walls, retaining structures, foundation blocks, and exterior brick or stucco surfaces. The smooth, self-priming formula fills porous voids, hairline cracks, and deep mortar joints in concrete block and poured concrete structures to create an active barrier against wind-driven rain and capillary moisture. It can be used as a standalone protective white finish or as a high-grip waterproofing primer layer under premium exterior acrylic topcoats. It features excellent alkali resistance, handling surfaces with high pH levels (up to pH 13) while inhibiting mold and mildew growth on the cured coating film to keep below-grade spaces clean and dry.