ChimneySaver Water-Base Water Repellent is a penetrating, V.O.C. compliant, water repellent which contains a proprietary modified siloxane. This water-based siloxane penetrates masonry up to 1/4 inch or more depending on surface porosity and moisture content at the time of application. ChimneySaver Water-Base Water Repellent reacts with the minerals in masonry in the presence of ultraviolet light and atmospheric moisture. This reaction forms strong permanent bonds beneath the surface and creates a hydrophobic zone that prevents water molecules from penetrating, while allowing free migration of water vapors. The chemical bonds formed in this process allow ChimneySaver Water-Base Water Repellent to become an integral part of the substrate and provide long-term water repellent protection. ChimneySaver water repellent is a brick sealer for leaking chimneys that prevents water penetration. Using this Chimney waterproofing product protects your chimney for 10 years. This 100% breathable brick sealant can be used for sealing stone veneer also.

• ChimneySaver Water-Base Water Repellent 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. Natural substrate color and surface textures are unaffected, with little or no gloss created. Slight darkening may occur on dense surfaces.
• Coverage rate is approx. 90-150 sq. ft. per gallon, depending on surface porosity
• Testing is recommended before treating any surface to ensure desired results.

Surface and air temperatures should be a minimum of 40°F. Do not use on asphalt-based material and surfaces. Do not apply to frozen or frost covered surfaces. Application must be to clean, sound, dry to slightly damp surfaces. Do not apply to wet or water saturated surfaces, or when rainfall is expected within six hours.