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The electrical properties of carbon microcoils ͑CMCs͒/ silicone-rubber composites were studied on the changes in the values of the electrical parameters ͑impedance, phase angle, resistance, and capacitance͒ as a function of the CMC content in the matrix, using an impedance analyzer in the frequency range from 40 to 200 kHz. Percolation paths were observed at a 3 wt % CMC content in the matrix. The properties of the composites were separated at the percolation threshold. The capacitance with a small value was dominant at CMC content less than 3 wt %, and the resistance was dominant at CMC content higher than 3 wt %.