Seal for sealing a gap between a bulkhead and a wall of a cargo hold, wherein the seal comprises a spine with two lateral webs. The webs can for example be tarps comprising magnetic parts. The spine can for example be an angled profile having to legs under right angles provided with slits along their longitudinal top edges for clamping a longitudinal edge of a lateral web. In a specific embodiment a chord can be embedded, e.g., stitched, along the longitudinal edge of the tarp, while the edge with the chord is hold in the slit in the longitudinal top edge of the legs of the spine.