with firmly mounted cone-head fitting and no-return valve. The KÖSTER ONE-DAY-SITE Packer allows injection works to be completed in one day. Immediately after injecting, that part of the port which protrudes from the wall can be unscrewed and removed. The central part of the port stays in the wall sealing the borehole so that no injection material can flow out of the borehole even under high pressure. The borehole can thus be closed immediately after the injection was carried out.