NATIONAL® Standard Bentonite 325 mesh is a Wyoming sodium bentonite that is used as a binder, a stabilizer, and a suspension agent to impart rheological properties to aqueous systems.  NATIONAL Standard Bentonite 325 mesh imparts the highest degree of instantaneous hydration over other Wyoming sodium bentonites, ideal as an additive for foundry coatings, industrial coatings, IOP, detergents, paper, ceramics, and household products.