Penetrating, VOC (volatile organic compound) compliant water repellent which contains a proprietary modified siloxane. Water-based siloxane penetrates masonry up to 1/4" or more depending on surface porosity and moisture content at time of application. Allows moisture in brick to evaporate. Natural substrate color and surface textures are unaffected, with little or no gloss created. Additional benefits include: efflorescence/stain protection, protection from acid rain and waterborne chemicals, mildew/fungus resistant, freeze-thaw protection. Protects most vertical and horizontal exterior, above-grade masonry surfaces including: adobe, architectural concrete, precast or cast-in-place, clay brick, mortars, natural stone, limestone, granite, sandstone, terra cotta, exposed aggregate products, Portland cement, stuccos, and concrete masonry units. Approximate coverage rates: brick wall 100-150 sq ft, concrete block 50-75 sq ft, concrete 75-150 sq ft, stucco 75-150 sq ft, limestone/sandstone 75-150 sq ft.