MasterSeal 581 Gray (formerly ThoroSeal) is a portland cement-based coating for concrete and masonry that provides protection against water, dampness and seepage. Mixed with MasterEmaco A 660, MasterSeal 581 creates a low maintenance and highly durable waterproof barrier that is NSF certified for potable water applications.
WARNING: This product can expose you to chemicals including silica, crystalline (airborne, unbound of respirable size), which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.