Description Use As A Protective Roof Coating For New Or Existing Composition Roofs With Smooth Surfaces, As A Base Coat For Reflective Coatings, Waterproofing Adhesive For Polyester Systems, And As An Anti-Corrosive Protection. 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