The system (1) has an annular base body (2) made of material such as polypropylene or polyethylene, and an annular sealing body (3) made of another material selected from one of foam, textile, natural or synthetic rubber and silicone, provided on the base body. The sealing body is located partially on an outer periphery of the base body. The base body includes a shoulder (6) at an outer periphery, where the sealing body is located in the shoulder. The sealing body includes a flexible sealing lip (10) that is sloped in radial direction and reduces thickness toward a free end.