Black Swan's 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.