Rheocin T Castor oil based Sud Chemie Waxes & Paraffin >> Castor Oil derivative (HCO-wax) SEALANT Additives for Caulks and Sealants Rheocin® T Inorganically modified version of Rheocin. Typically easier dispersing due to improved particle separation. Other properties are similar to Rheocin. Inorganically modified castor oil based powdered thixotrope. Used as a rheology modifier in caulks and sealants. Designed for aliphatic (low polarity) systems. Offers very good balance of sag control and flow. Requires shear and processing temperature range. Provides easy dispersing due to improved particle separation.