Description A High-Grade Mastic Compound Of Asphalt And Mineral Fillers. This Material Is Blended In Proportions To Assure Maximum Resistance To Weathering While Providing Ease Of Application. 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