The effect of glass fibers (GF) on the rheometric (vulcanization) characteristics of the rubber compound, physico-mechanical, performance and dynamic properties of vulcanized rubber based on general and special purpose caoutchoucs for rail fastenings has been studied. It is shown that with the introduction of GF into the rubber compound, an increase in the minimum torque and the time of the onset of vulcanization is observed. An increase in the content of GF in the rubber compound leads to an increase in elastic-strength properties, hardness, a decrease in tear resistance and changes in physico-mechanical parameters, hardness of vulcanizates after daily thermal aging in air and after exposure to standard SZhR-1 liquid. GF contribute to an increase in the mechanical loss factor and the storage modulus of vulcanizates. It was found that the rubber compound containing 12.0 phr, has improved technological properties, and vulcanizates based on it are characterized by increased physico-mechanical, performance and dynamic parameters.