HY-550 is premium heavy-bodied CPVC solvent cement, customized for CPVC fire sprinkler piping. It features excellent flame retardancy and high heat resistance, keeps pipe joints stable and reliable for fire protection projects, meets ASTM related standards. ABOUT US Foshan Shunde Guanye Building Materials Industrial Co., Ltd. is headquartered in Shunde, Foshan. Its independent brand H&Y Hongye was founded in 1996. With nearly 30 years of dedication to the R&D and production