Dongguang County Tongyu chemical limited liability company   

Our factory was built in 1986, produced the first batch of high temperature bolts China anti sintering agent -- GF-1 type bolt of high temperature burning proof agent, over high temperature industrial equipment "bolt protector" long history of dependence on imports. By sampling a user trial and research department, in December eight seven through the identification of the quality of science and Technology Commission of Hebei Province, Cangzhou City Bureau of standards and metrology, nine one years and have developed GR-9, GR-12 type anti sintering agent, so that the anti burn agent series of products, expand the applications from the oil chemical industry, thermal power chemical fertilizer, chemical, and metallurgical system to railway locomotive. For five consecutive years by the Cangzhou Municipal Technology Supervision Bureau as "quality trustworthy product...