At the time of boring for Pile, the sides of the bore hole are subjected to numerous external forces and pressure like active earth pressure, hydrostatic pressure, pore pressure, etc due to underground water. As a result the side of the bore become unstable and may collapse if the soil layers remain weak.

Due to its thixotropic property, bentonite is used as a supporting fluid to counter the external pressures and stabilize the sides of the bore hole.

Piling grade bentonite is sodium based polymer treated Bentonite design to meet the require rheological property of many high tech drilling practices like as HDD HDB Micro Tunnelling and other similar technology also recommended for all type of vertical drilling application.