Henry Black Asphalt Rubber-Based Driveway Crack Repair 1 gal (Pack of 4)Asphalt based material for effectively filling cracks in asphalt pavements. Ready to use straight from the container, Henry's Driveway Elastomeric Crack Filler gives do it yourselfers an easy way to fill minor cracks in home driveway surfaces. It is a unique elastomer modified asphalt base emulsion produced by incorporating the rubber polymer into the asphalt using extreme pressures and temperatures. Formulated with additional adhesion promoting