TMTD can extremely accelerate curing rate of natural and synthetic rubber and has good scorching safety. It almost does`t affect degree of cross-linking butlower scorching rate and extend total curing time when thiols or sulfenamides is added in. Aldehyde-amines and guanidinesalkaline accelerators can activate TMTD. It is a primary accelerator with sulfur, a secondary accelerator with thiazoles and a vulcanizer in sulfurless vulcanization. Sulfurless or low-sulfur vulcanization can provide excellent heat aging resistance properties for vulcanizates.