A sealing, trimming or guiding strip (15) for windows of a motor vehicle comprises a loop formed around the fixed quarter light (11) of the vehicle and a further loop formed around the sliding main window (9) of the rear door of the vehicle. This strip comprises an extruded part (19) extending along both loops to provide a pleasing continuous appearance for the exterior of the vehicle. A portion of the extruded material (19) is cut away and replaced by molded material molded onto the extruded part (19) for the portion of the strip into which the quarter light (11) is mounted.