Austin, TX February 2, 2012 SACHEM launches Endura CS™ and Endura CSG™, a line of clay control agents for oilfield and fracing applications. Designed as a replacement for Potassium Chloride (KCl), our line of Endura clay control agents provides the most effective way to control clay swelling in aqueous based drilling muds, frac fluids and to increase the viscosity…