Rhenogran® MBTS Active-90 Rhenogran® MBTS Active-90 Available in America, Asia, EMEA, India Chemical Composition synergistic combination of dibenzothiazole disulfide (MBTS) and zinc dialkylithiophosphate (ZBOP) Polymer Binder EPDM base % Active Ingredient 90 Appearance / Supply Form green granules