... final viscosity of a certain batch. Bentonite,bentonite clay,bentonite additive,chemical bentonite,Thickener additive,thickener agent,Bentonite thickener,organoclay rheological additive,rheoligical additive,organoclay ... clay (organoclay) for oil drilling fluids,Oil Drillling Fluid bentonite clay Description: Calcium based BentoniteMajor Function: Viscosity AgentTesting specification: Per API spec ...