Mix Microseal with water onsite to form a deep-penetrating, alkali-resistant water-repellent emulsion that protects masonry and concrete surfaces against damage due to water, chloride ions, freeze-thaw cycles, and scaling. It also helps prevent efflorescence, remains highly vapor-permeable, and stands up to UV rays and weather. Rainguard International. 888-765-7070. www.rainguard.com