Sealing element for sealing a gap and sealing arrangement

The element (1) has a middle area (10) provided with a surface and arranged between ends (6a, 6b) in a cross section that is perpendicular to a main line (21). Sealing tooth comprises a rectangular cross sectional contour, where sealing tooth height (H) ranges between 10 and 40 percentages of entire thickness (D) of the element. The element exhibits thickness that ranges between 0.3 mm and 0.7 mm. A groove width (B) and sealing element thickness coincide with each other under consideration of component tolerances.