ChimneyRx® Masonry Chimney Water Repellent is a modified siloxane based product specifically designed for chimneys to penetrate deeply in to most masonry and concrete pores.
Unlike acrylics, silicones, and other waterproofing sealers that form a film on the surface and trap water vapors, ChimneyRx® masonry waterproofing products allow deep penetration of the active ingredients of up to 1/4 inch or more.
As a result, the special siloxanes in ChimneyRx® Masonry Chimney Water Repellent react to form strong chemical bonds beneath a treated surface. These bonds allow the product to become a physical part of the structure and provide long-lasting water repellent protection without altering the appearance of the brick.
Breathable Masonry Waterproofing Prevents Chimney Water Damage
Moisture, from either internal or external sources, is usually present in brick, masonry, and concrete. A ChimneyRx® Masonry Chimney Water Repellent treatment is 100% vapor permeable, which allows the water vapors to escape. This reduces costly chimney repair such as spalling, scaling, deterioration, and freeze-thaw damage that results from trapped moisture when film-forming water sealers are used. The best way to prevent chimney water damage is by using chimney repair products such as ChimneyRx® penetrating (non film-forming) water repellents that will allow vapors to pass through.
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