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Who We are ?


BNBM OTAi Polymer Waterproof System (Tianjin) Co.,Ltd. (formerly Tianjin Binhai OTAi Waterproof Material Co., Ltd.) was established in 2010. The company is located in Tianjin Binhai New Area, a key national development area, with a registered capital of RMB 110 million. In September 2021, OTAi was restructured into a state-owned enterprise, affiliated to BNBM Waterproof Co., Ltd., which is a R&D and production base under BNBM Waterproof focusing on high-end building waterproof materials.


At present, OTAi has Three polymer membrane production lines, One polymer coating production line, and One plastic modification production line. The annual production capacity of waterproofing membranes is about 15 million square meters, and the modified pellets are 2,000 tons. OTAi's waterproofing products mainly include TPO waterproofing membranes, PVC waterproofing membranes, HDPE waterproofing membranes and polymer-modified cementitious waterproof coating and waterproof prefabricated products.


OTAi's products are widely used in waterproofing projects such as aerospace, high-speed rail, subway, exhibition venues, government construction, medical and health care, industrial plants, tunnels, etc. Projects include: Hong Kong-Zhuhai-Macao Bridge Zhuhai Link, Airbus Tianjin A330 Wide-body Aircraft Completion and Delivery Center, New Generation Launch Vehicle Industrialization Base, National Convention and Exhibition Center (Tianjin), etc.


BNBM OTAi is a national high-tech enterprise. It has successively won the honorary titles of “Gazelle” enterprise, "Specialized, Refined and New" enterprise, and “Industry Leader”. OTAi has passed management system certifications such as quality management, environmental management, occupational health, and green factory, etc. BNBM OTAi adheres to the group's "commanding heights" strategy, takes brand building and technological innovation as the engine, continues to deepen technological innovation and service upgrades, and gains recognition and trust from all walks of life with its strong brand competitiveness and influence.