NATIONAL® Premium Bentonite 325 mesh WT is a untreated Wyoming sodium bentonite that is used as a binder, a stabilizer, and a suspension agent to impart rheological properties to aqueous systems.  NATIONAL Premium Bentonite 325 mesh WT imparts synergistic compactability with polymers, ideal as an additive for foundry coatings, industrial coatings, detergents, paper, ceramics, and household products.