Abstract: A sealing apparatus for tamper-evidently closing an opening in a sealable product comprising a locking housing mountable adjacent the opening and including an entrance passage leading to a stall; a fastener for closing the opening, the fastener having a fastener head adapted to pass through the entrance passage into the stall and an actuator tab attached to and movable about the fastener head to, with the fastener head received into the stall, engage with and close the entrance passage behind the fastener head, and a seal for tamper-evidently securing the actuator tab in position in the entrance passage.

Abstract: A re-usable envelope having a zip closure which can be locked closed by a sealing device. The sealing device is of plastics material, one part being mounted to the envelope and the other part being engageable therewith, the sealing device only being operable by breaking said other part. The zip tag includes a part for manual engagement to facilitate closing of the sealing device.