One line. According to the official website of Deco (Guangzhou) Building Materials Co., Ltd., we learned that Deco DCO tile adhesive is one of the top ten tile adhesive brands in the domestic special dry mortar industry. It is a subsidiary of the French PAREX Group, the world's major construction mortar company. Deco (Guangzhou) BUILDING MATERIALS LIMITED. Therefore, JCDecaux tile adhesive is a first-line brand.