Used as Earth Electrode Backfill Compound for reducing soil resistivity.  

Bentonite moisture retaining clay is used to lower the resistance to earth by providing ground enhancement and effectively reducing the resistance between soil and earth electrode (such as copper earth rod or earth mats). This inherent ability to absorb and retain rainwater increases the electrical conductivity of the earthing compound in positive correlation to local climatic conditions, specifically average rainfall levels. Typically, the compound has 3 ohms resistivity level and is a cost-efficient material for backfill of earth electrodes and improving performance when it is physically impossible to drive the earth rods deeper underchallenging ground conditions such as rocks, granite, etc.