HE305 - driveway elastomeric crack filler is an asphalt based material for effectively filling cracks in asphalt pavements. HE305 - driveway elastomeric crack filler is a unique elastomer-modified asphalt base emulsion produced by incorporating the rubber polymer into the asphalt using extreme pressures and temperatures. It is formulated with additional adhesion promoting polymers to provide a tight, highly extensible and flexible, dried film with excellent resistance to water, weathering and elevated temperatures.