In the present work, self-healable blends were prepared by blending brominated isobutene-isoprene rubber (BIIR)/natural rubber (NR), respectively, with silica and conductive carbon black (CCB). An addition of butyl-imidazole as physical crosslinker for the BIIR phase provides the composite materials with non-covalent bonds, which are responsible for their self-healing properties. A new method based on the wetting concept was developed in order to quantitatively determine the phase selective localization of the hybrid filler silica/CCB in blends. It was found that the mechanical and electrical properties of BIIR/NR are strongly dependent on the hybrid filler localization. In addition, Joule heating treatment of the damaged blends at a medium temperature in a short time period, e.g. 100 ° C and 10 minutes, essentially accelerates the self-healing process.