The silicon elastomers offer in our days new perspective for the construction in the precision engineering and in the medicine because of their special mechanical, electrical, optical. and chemical properties. Since the essential material parameters and dynamic models of this materials are only partially and not exactly known for the CAD and for the FEM simulations it was important to estimate this characteristics. For the identification of the dynamic model of this material we used the method of synthesis well known for the calculation of passive electric filter (impedance) networks. We found with help of this method a precise description of the phenomenological modeling of the behavior of silicon rubbers since the measured data have been used for the mathematical operations.