ChimneySaver is a photo-reactive chemical composed of ingredients which causes a treated surface to repel water much the same way that two identical poles of a magnet repel each other.

    ChimneySaver is a photo-reactive chemical composed of ingredients which causes a treated surface to repel water much the same way that two identical poles of a magnet repel each other. Penetrating and bonding with the porous surfaces of concrete, masonry and stucco, ChimneySaver prevents spalling, stains, chloride attack, freeze/thaw damage, loss of insulation value, deterioration, corrosion, efflorescence, mildew and the damaging effects of acid rain and other waterborne chemicals and features a 10 year limited warranty. This water based formula is VOC compliant and contains no hazardous chemicals.