Rubber adhesive RS produces adhesion by reacting with methylene donor. For example, rubber adhesive A and RA react with each other to produce thermosetting resin. The reaction will occur very quickly at vulcanized lacrimal levels. If the reaction occurs before vulcanization. The bonding effect of the matching system will be lost. Usually a mud compound consisting of rubber, filler and rubber adhesive RS is prepared at a high temperature and then the subunit donor and co-other complex are added. It can be used for natural adhesive or various synthetic adhesive to bond with nylon, polyester, Vinylon, rayon, cotton, glass fiber and copper-plated cord. RS should be added at the beginning of mixing.