Black Swan PVC Cement - Heavy�is a clear, heavy bodied, low set, high strength PVC solvent cement used to join PVC pipe and fittings. PVC Cement - Heavy is used for all classes and schedules of pipe and fittings through 12 diameter. Can be used on irrigation, gas and conduit pipe. PVC Cement - Heavy is most effective when used in temperature ranges from 40� F to 100� F.