Tixogel MP Organoclay Sud Chemie Rheology Modifiers / Thickeners >> Organoclay SEALANT Additives for Caulks and Sealants Tixogel® MP Maximum Performance organoclay for aliphatic to aromatic systems. Requires polar activation. Very good performance organoclay. Used as a rheology modifier for caulks and sealants. Designed for aliphatic and aromatic systems. Requires polar activation.