GNS is a group of companies in China, established in 2003 and headquartered in Chagugang Town, Wuqing Dist., Tianjin. In the past 18 years, GNS Group has been committed to technical researches, manufacturing and marketing of PU foam, silicone sealant, epoxy sealant, and marble adhesive, as well as providing first-class sealing and bonding solutions for the domestic and the world.