Description & Applications Civil work bentonite is an easy to mix, high yield sodium bentonite formulated to provide viscosity and fluid loss control in water based mud systems that meets piles, civil work, water drilling, and diaphragm walls drilling requirements. Provides quick viscosity and lubrication. Reduces fluid loss during excavations. Deposits thin filter cake on bore walls to improve borehole stability Aids hole cleaning Environmentally safe Packaging : API bentonite is available in 25 kg paper sacks and 1 ton jumbo bag.