<p>The seal consists of an outer surface (91) with a coating applied according to the Physical Vapor Deposition (PVD) and/or Chemical Vapor Deposition (CVD) and/or Plasma Assisted Chemical Vapor Deposition (PACVD) method. The outer surface of the support ring (9) and/or the inner surface (22) of the opening (2) of the high pressure container (1) rests against the supporting ring or sealing (9).</p>