Shanghai Yu Hao Chemical Technology Co., Ltd. Long-term supply of butyl rubber 1751,532,1650,268,1675N, 1066,1068,301, BK-232, CBK-139, X2,2211,2222,2244,2255,1240,2030, 2230 other brands complete. Product Name: regular butyl rubber grades: Lanxess Butyl 301 301 Canada, superior grade, mainly used inner tubes, water births, balloons, hollow glass, wire and cable insulation, chemical equipment lining and shock products, heat-resistant conveyor belt heat aging tape products, quality assurance, price concessions. Welcome to contact us.