Fill your blacktop cracks & joints permanently Forms bond to sidewalls of cracks No volatile organic compounds Latex-ite Pli-Stix 60 ft. Driveway Crack and Joint Filler - Small Black is a contractor-grade thermo-plastic rubber designed for use with a propane torch or heat gun. It is a permanent, patented, self-leveling seal for small asphalt and concrete cracks. This product produces a 100% watertight seal.