Fast-curing ultra-accelerator for NBR, EPDM and most other polymers. May be used alone or with thiazoles. Cure modifier in CR: retards G-types, accelerates W-types. TMTD can also act as a sulfur donor for semi-EV and EV-type cure systems. Vulcanizates that are cured with TMTD used as an accelerator with little or no sulfur have excellent aging properties.