Black Jack Speed-Fill Blacktop Filler is a fast drying, rubberized compound for use on the repair of asphalt roads, driveways, pavements, expansion joints and walkways. Speed-Fill Blacktop Filler provides a long term flexible repair on cracks and joints up to 1 In. wide and the quick-dry formula speeds up seal coating jobs. Black Jack Speed-Fill also seals foundation walls and other pavement surfaces. Speed-Fill Blacktop Filler dries to dark, black finish.