MasterSeal 581 50 Lb. Gray Masonry Waterproofer wi-fi x 3-1/2" W

x 3-1/2" W

Angle is cut from rolled structural steel and provides greater reinforcement strength than if the steel was bent into shape

High quality stainless steel injector resists clogging and unscrews for easy washing

For 3/4" or 1-3/8" doors up to 50 lb

MasterSeal 581 50 Lb. Gray Masonry Waterproofer wi-fi x 3-1/2" WFormerly known as Thoroseal. MasterSeal 581 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.