Advitrol 50 Castor oil based Sud Chemie Waxes & Paraffin >> Castor Oil derivative (HCO-wax) SEALANT Additives for Caulks and Sealants Advitrol® 50 Rheotix® 50 Inorganically modified version of Advitrol 100. Typically easier dispersing due to improved particle separation. Other properties are similar to Advitrol 100. Inorganically modified castor oil based powdered thixotrope. Used as a rheology modifier in caulks and sealants. Designed for aliphatic (low polarity) and aromatic (medium 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.