Tixogel MP 100 Organoclay Sud Chemie Rheology Modifiers / Thickeners >> Organoclay SEALANT Additives for Caulks and Sealants Tixogel® MP100 Maximum Performance organoclay. Self-activating product offering superior sag control and greater viscosity build. Self-activating very good performance organoclay. Used as a rheology modifier for caulks and sealants. Offers superior sag control and great viscosity build.