Sino-Gel Standard GTC4is a bentonite characterized by its high yield, high gel strength and low shear. It is a suitable product for civil-engineering incl. applied drilling fluid system for horizontal directional drilling (HDD), applied fluid solutions for diaphragm walls and piles, lubrication fluids for micro tunneling or pipe jacking and shield tunneling. It can improve the borehole stability especially in unconsolidated formations. The high performance and low concentration of the bentonite can reduce the quantity of the usage, the costs and the labor during transportation and mixing.