NATIONAL® Premium Bentonite 325 mesh is a high yielding 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 imparts high viscosity, ideal as an additive for foundry coatings, industrial coatings, detergents, paper, ceramics, and household products where microfine particle size is desired.