Abstract: “COVERING FOR LOW VOLTAGE CABLES”, class C, whose service temperature is between −40° C. and +125° C., for cars, aviation, boats, with reduced and/or ultrafine insulation, free of halogens and of polymer composition. The covering is made using a polymer thermoplastic-based (non-reticulated) material formulated as a blend of: a rigid phase, a blend of different polypropylenes with nucleant agents, of an adequate fluidity for extrusion; an elastic phase, a blend of different polyethylenes of an adequate fluidity for extrusion, of densities >0.906 g/cm3; and a fireproof mineral load, Magnesium Hydroxide, with synergic agents.