1.Bentonite of drilling,paint,coating 2.High qulity of bentonite powder 3.Hot-sale,bentonite of oil drilling,paint,coating etc 1. ... in the near future!2.1)Raw material:high quality bentonite and concentrated sulfuric acid2)Quality Indices:3)Usage and application scope: Applied ... and dry place.Storage life : two years.4.Photo: Bentonite--hot-sale,high quality,of oil drilling,paint,coating etc.