Weld-On® 729™ is an industrial grade, gray, low VOC emission, extra heavy bodied, slow setting, high strength CPVC solvent cement for all classes and schedules of industrial piping and duct with interference fit through 24" diameter. Weld-On® 729™ is for use on CPVC industrial piping and duct applications. It has higher gap filling properties than Weld-On® 714™ and is ideal for saddles and fabrication of large fittings. Weld-On® 729™ has a shelf life of two years in a tightly sealed container.