Description Fills And Seals Cracks In Concrete And Masonry. Contains Silicone For Improved Adhesion And Water Resistance. Repairs Cracks In Steps, Driveways, Sidewalks, Mortar Joints And Similar Surfaces. 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