ChimneySaver Advanced Water Repellent is specifically designed to shield masonry chimneys from the harmful effects of water and waterborne chemicals. It effectively prevents water penetration and damage caused by water. ChimneySaver Advanced Water Repellent utilizes a unique polysiloxane compound that showcases exceptional performance, rivaling that of a solvent-based product. This specially formulated compound enables the water repellent to effectively penetrate through existing penetrating water repellents (water or solvent based), setting it apart from the standard ChimneySaver Water-Base. As a result, ChimneySaver Advanced offers reliable and long-lasting protection for masonry chimneys, making it an excellent choice for both initial applications and re-treatments.