In terms of cradle-to-cradle recycling, options to really DE-VULCANIZE end-of-life rubber articles are most prominent choices. On the other hand, the technique of rubber vulcanization was meant to achieve the utmost durable rubber-elastic state of matter, preferably resistant to the most diverse and harsh environments. To shortcut this ostensible contradiction poses a difficult challenge to the rubber world at large. De-vulcanization involves primarily the breakage of crosslinks, while keeping the polymer chains as much as possible intact. It needs to be distinguished from techniques grouped under the generic name of reclaiming, which break crosslinks as well as polymer chains, and so result in serious regression in re-vulcanized properties. The presentation provides an overview of the state-of-the-art of the possibilities for real de-vulcanization of the elastomers: NR, SBR, BR, IIR and EPDM, as developed over the past two decades by the University of Twente. Some have reached the stage of commercial application, others are still at a lower level of technological readinessy. The chemical and technical reasons behind these different states are highlighted.