ChimneySaver VOC Compliant Solvent Base is 100% vapor permeable, which means it won’t trap water vapors that may pass through the bricks when the chimney is in use, unlike other products found in most hardware or home improvement stores. Those products, when applied to a masonry chimney, can actually slow down water vapors as they pass through the chimney, which leads to water damage.
Which Product to Use
ChimneySaver is available in both solvent (mineral spirits) and water-based formulas. The water-based formula is most popular; however, if a water repellent has previously been applied to the masonry, we recommend the VOC Compliant Solvent Base formula.
Moisture from a variety of sources is always present in masonry and concrete. Sealers and silicone coatings form a water resistant surface film which trap water vapors inside. If these vapors cannot escape, they will contribute to spalling, scaling, deterioration, and freeze-thaw damage. ChimneySaver is a 100% vapor permeable, non film-forming water repellent that penetrates and lines masonry pores.
Due to new VOC regulations, the sale of regular ChimneySaver Solvent Base has been prohibited in certain states. VOC Compliant Solvent Base works the same as the regular ChimneySaver Solvent Base with the following exceptions: it dries faster, it’s only available in one-gallon containers, and it has a different smell. Aside from the above three differences, VOC Compliant Solvent Base is applied in the same manner and has the same 10 year warranty.
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