BENTONE 128 additive is a moderate downhole temperature performance organoclay designed to deliver rapid dispersion and good sag resistance properties. BENTONE 128 is specifically designed to provide rapid rheology build in low temperature field conditions down to 35°F (2°C). Under these conditions, BENTONE 128 will effectively viscosify invert and all-oil muds formulated with diesel, mineral oil, and poly, linear and iso alpha olefins base fluids.