Doors with vertical closing edges, e. g. folding doors, have a crossbeam width of approx. 50 mm and a gap width requiring to be safeguarded of at least 120 mm. The closing edge safety feature is required to cover the entire crossbeam width and to close and seal the gap without triggering the switching strip. At the same time, it is required to possess high lateral sensitivity, so that a possible pinch is detected as soon as the door wings are turned. The rubber-sheath-profile developed specifically for this application, with the associated aluminium special rail and the Contact-Duo-Profile 3100.1610, meets these requirements.