A particular mixing technology for the production of sophisticated compounds is presented. The compounds are mixed in a VIC internal mixer, equipped with inter-meshing rotors which can vary the distance between the rotors, allowing a better dispersion of the fillers and an outstanding quality level of the final compound in a single mixing stage. The cooling capacity of the mixer enhances the temperature control of the rubber and enables to process the compound in a single stage, using a nearly isothermic condition when loading and mixing the curing agent. A stock discharge temperature in a range of 100-110degrees can easily be maintained. Three different compounds, based on EPDM or SBR or NBR rubber, have been considered and the results in term of mixing quality and productivity is presented.