Description Rapid setting, high strength repair material designed to plug leaks instantly in concrete and masonry. Can be used above and below grade. Used for blocking running water or leaks in cracked masonry or concrete surfaces. Obtains high strength and rapid setting qualities while repelling water. WARNING: This product can expose you to chemicals including Lead which is known to the State of California to cause cancer, birth defects or reproductive harm and Butyl Benzyl phthalate (BBP) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov