Bentonite is widely used for earthing due to its beneficial properties: Moisture Retention: Bentonite retains moisture, which helps to lower the resistance between the soil and earth electrodes, enhancing the performance of earthing systems. Low Resistivity: It has low resistivity, making it a superior choice for grounding applications compared to traditional methods. Ground Augmentation: Bentonite acts as an earth electrode back-fill, effectively reducing soil resistivity and improving grounding effectiveness. Natural Composition: The sodium-based clay swells significantly when mixed with water, further aiding in moisture retention and resistance reduction. Overall, bentonite is an eco-friendly and efficient material for improving earthing systems.