Fast curing speed accelerator used for CR. Curing rate is similar with ETU, scorch safety is between ETU and DETU.

Specially used for HT-ACM and AEM compounds.

Used as fast accelerator in IIR. Often combined with thiazoles or sulfenamides.

Known as TRA. An ultra accelerator and also acts as sulfur donor.

Known as CBS. Primary accelerator with fast speed and good scorch safety.

Known as M. Primary accelerator with moderate speed.