... ,paint,coating 2.High qulity of bentonite powder 3.Hot-sale,bentonite of oil drilling,paint,coating etc 1.Introduction:Shijiazhuang Oushun ... of minerals(diesel,kerosene,gasoline,grease,paraffin wax,white oil,lubricating oil,vaseline,ect.)Industrial waste oil(mineral oil like machine oil and lubricating oil) ... : two years.4.Photo: Bentonite--hot-sale,high quality,of oil drilling,paint,coating etc.