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https://www.remora.net/catalogue/Earthing-Lightning/Inspection-Earth-Pits/Soil-Conditioning-Bentonite Soil Conditioning Bentonite - Remora Electrical Limited Bentonite is a moisture retaining clay used as an earth electrode back-fill to help lower soil resistivity. The clay is a sodium activated montmorillonite,... soil conditioningremora electricalbentonitelimited