BENTONITE is a moisture retaining clay consisting of sodium montmorillonite. By mixing BENTONITE with water, the resultant slurry will swell and multiply its original dry volume. When used as a backfill material, within a borehole earth system, it will continue to absorb water from the surrounding soil - thus helping provide a stable earth resistance. This is also applies when the clay is used to surround earth plates and lattice mats. It strongly adheres to the earth electrodes ensuring good electrical conductivity between the electrodes and surrounding ground.