The sealing lip (5) via a weakening point forming a bending link is connected with a support section (7) extending away from an outer edge (2c) of the basic section (2) inclinedly from the profile centre. A sealing bulge (6) on the sealing lip has a sealing edge (14) extending over the other outer edge (2d) of the basic section (2). The sealing bulge enclosing a hollow space (2) forms in cross-section an obtuse angled triangle, the wall (13) of which opposite to the basic section rises to the sealing edge (14). An outer bulge wall (15) in the obtuse angle connects to the outer edge (2d) of the basic section.
