To repair a concrete driveway you use a concrete mix. First clean the cracks using a pressure washer. Be sure to remove all weeds. When the crack is deep, fill it to within 1/4" of the surface with sand. Tamp down sand. Apply concrete patching compound. Allow it to cure and then apply a sealant. For step by step instructions for concrete driveway repair visit:
. http://paint-and-supplies.hardwarestore.com/learning/how-to-repair-concrete.aspx
