Abstract: The invention relates to a device for sealing the gap (14) between two adjacent hatch covers (10) located at least at approximately the same height, having at least ferromagnetic hatch cover edges (13), wherein a flat flexible strip (1; 1?) is placed across the entire gap (14), wherein the width (Bs) and the length (Ls) of the strip are larger than the width (Bz) and the length (Lz) of the gap (14) and the longitudinal edges (3; 3?) protruding the width (Bz) of the gap (14) of which are placed on the adjacent hatch cover edges (13) in a plane manner under magnetic force.