Description
Safeguard your exterior structural investments against premature coating failure with Sherwin-Williams LOXON Concrete & Masonry Primer/Sealer. This high-performance, weather-resistant acrylic primer is engineered specifically to condition and seal highly alkaline mineral substrates characterized by high pH levels (up to pH 13). Ideal for application on concrete, brick, stucco, tilt-up walls, and cement board, it seals porous surfaces to ensure a uniform topcoat sheen holdout. By creating an impenetrable chemical barrier, it prevents efflorescence—the unsightly migration of white salt crystals—and stops moisture from blistering your premium exterior paint finishes. The formula bonds tightly to fresh, un-cured masonry surfaces that have aged as little as seven days, significantly speeding up construction and painting project timelines.
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