compressed layers. In the Spring and Summer months the brick that compose your chimney soak up water and it remains trapped inside the brick. In the winter months when the temperature drops below freezing, the water trapped inside the brick freezes and it expands. This results in the faces of the brick popping off the brick. This process is called Spalling.
waterproofing. This makes the waterproofing 100% vapor permeable. The waterproofings purchased at your local hardware stores are a silicone based sealant, that is why it is cheaper at the register. A silicone based waterproofing can not let the chimney breath. The silicone base sealant traps the water inside the chimney and will actually speed up the process of chimney deterioration. Silicone based waterproofings are good for sidewalks and driveways, but not for the chimney.
The Chimney Saver Water Repellent comes with a 10 YEAR Guarantee. It is environmentally friendly and dries to a clear, non-glossy finish. The chimney Saver Waterproofing will protect your chimney for years to come and help prevent any further damage that may have already occurred.