A polymer-based layer structure with an oleophobic/hydrophobic surface for coating, sealing, and/or connecting technical components or parts of said components, comprising—a first layer which comprises a polymer, —a second layer that adjoins the first layer and comprises a polymer and particles which comprise a fluoropolymer and which are distributed in the silicone, and —an outer layer that adjoins the second layer and comprises a fluorocarbon compound with at least one reactive group and optionally particles which comprise a fluoropolymer and which are distributed in the fluorocarbon compound. The invention also relates to an electric machine which has the layer structure, said layer structure being provided in particular as a potting compound on a winding and/or on switching rings of the stator and/or as a magnet bonding adhesive of the rotor.