Rubber active agent also known as vulcanizing active agent. An inorganic or organic substance used to make a vulcanization accelerator active. It can maximize the capacity of the accelerator, reduce the amount of accelerator, and shorten the vulcanization time. Most of the inorganic additives are metal oxides, hydroxides and basic carbonates, such as zinc oxide, lead oxide, calcium hydroxide, lead carbonate, etc., the most important thing in organic additives is fatty acids, followed by amines, soaps, etc. Such as stearic acid, dibutyloleic acid amine, zinc stearate, etc. The general dosage is less than 5% of the weight of rubber.