Self-regulating heating materials are desirable in fields where the installation and usage of electronics is troublesome or hard to accomplish. These are materials, with a positive temperature coefficient of resistivity – the resistivity of the material increases with the temperature [1]. By applying voltage to the material, the electrical resistance will keep increasing until it finds equilibrium at a particular temperature/voltage and does not heat further. We investigated electro-thermal properties of carbon black – ethylene-octene copolymer (EOC-CB) composite for using the composite as self-regulating heating material. The materials electrical resistance vs temperature was measured as well as the temperature and the resistance change when voltage is applied to the material was investigated.