Caustic Soda, Paraffin Wax, Calcium Carbide manufacturer / supplier in China, offering Bitumen 60 70 in Bulk Original Bitumen/Asphalt High Quality Grade Petroleum Natural Asphalt Bitumen for Road Construction, Thioglycolic Acid for Water Treatment, Sg3/Sg5/Sg7/Sg8 White Powder PVC Resin and so on.