The invention relates to a sleeve body, made from elastomers for connecting high-voltage polymer cables for direct current. The insulation of the sleeve body comprises two insulation materials which have different electrical properties. By using two insulation materials with different specific electrical resistances, a more uniform distribution of the electrical field can be achieved in the sleeve body across a large temperature range. It is therefore important that the insulation material with the lower specific electrical resistance (5) forms a continuous connection between the deflector (4) and the center electrode (7) in the sleeve body. In order to guarantee a high electrical dielectric strength under surge voltage, it is likewise important that no boundary surface is located between the insulating materials within the sleeve body in the electrically critical area between the deflector (4) and the cable insulation (1).