Crack-Stix 125 ft. Medium Gray Permanent Concrete Joint ...- Driveway Expansion Joint Repair Products ,can product be used vertically (on block wall expansion joints) Asked by: MARK I don’t believe so because it liquifies when heated with the blow torch and sinks into the crack.Expansion Joint Replacement Products - YouTube · Repairing cracks, missing expansion joints and holes in concrete or asphalt is critical to preserve the integrity of the structure, maintain aesthetics as well as for safety reasons.