Black Jack Pro Series, 4.75 Gallon, Rubber-Seal #57, Rubberized SBS Roof Coating, Premium Liquid Applied Asphalt Coating Has A Blend Of Rubber & Reinforcing Fibers To Provide A Strong, Flexible, Waterproof Seal, Exceptional Adhesion To Roll Roofing, Masonry Surfaces & New Asphalt Rolls, #57 Is A Modified Bitumen Adhesive Designed To Bond Sheets Of Sbs Or Standard Asphalt Roll Roofing In Cold Process Roofing Systems, Addition Of Rubber Enhances Performance To Last Longer, Resist Cracking & Provides Increased Waterproofing Protection, Restores Worn Roofs, Ideal For Waterproofing Foundations, Flexes To Resist Cracking, Low Odor, Water Cleanup, Liquid Brush Grade.