Abstract: An insulator comprising a rod made of continuous glass fiber impregnated with epoxy resin, metal end fittings, and a polymeric sheath. The rod is tightly embedded in the sheath and the ends of the rod are pressed into the fittings. The sheath consists of alternately mounted segments of two types: spacing sleeves made of elastic material and externally profiled sleeves made of stiff material. The spacing sleeve has beads at the ends. In order to transfer axial forces, the spacing sleeves are partly covered by the profiled sleeves, said covered portion including the beaded ends. The method by which this insulator is made consists in that, first, the spacing sleeves, made of silicone rubber, are cast directly onto the rod by the pressure-injection method; second, the rod is covered by a layer of adhesive agent from the silicone group and, third, in the interspaces formed between the spacing sleeves, the profiled sleeves are cast in a split mold by means of the injection method.