E-Z Weld Chemical Resistant Gray is a heavy bodied, medium set CPVC Solvent Cement. This cement is part of our Industrial Grade line of products. This cement is formulated for use on all classes and schedules of PVC/uPVC and CPVC pipe and fittings with interference fit up to 12" (315 mm) diameter. It may also be used on small diameter pipes and fittings. Industrial strength cement specifically designed for use on PVC / uPVC and CPVC piping systems carrying acids, bases, salts and hypochlorites. When joining large diameter pipe & fittings the use of primers is highly recommended.