Abstract: A tape for closing an opening in at least substantially dustproof but ventilating manner includes an elongate strip of fabric (10) with an open pore structure (11). The strip is provided according to a pattern (13) with a layer which at least substantially completely closes the pores locally and on a rear side with a glue layer in opposite edge parts (12). The glue layer is arranged between the edge parts (12) in accordance with the pattern and at least almost completely closes the pores (11) locally.

Abstract: Method for the sealing of the openings in the end surfaces of a sheet-shaped synthetic material that consists of two or more outer plates which are mainly flat and which are mounted on partitions. The partitions are spaced roughly even distance from one another and run along the total length of the material. Over every end opening a dust-proof, water-vapor permeable and ventilating non-woven first foil, e.g., of polyester fabric, is put, and on top of or under that one or more strips of a second foil, e.g. of aluminum, are put, of which the edges are beaten around and secured to the outer plates. This is done in such a way that every end opening discharges, at least partially, through a part of the first foil which is not covered by the second foil. The invention also comprises the foil material to be used, preferably consisting of two strips of foils as described, fixed against each other, before being put over the openings. An intended use is as a transparent covering for light streets.