[raulus]

I've used the archival tape before too, to re-piece back together some separated flaps on Jell-o complete boxes.

Just keep in mind that the archival tape is not transparent, and will look like a bit of gauze wherever you place it. So you'll want to be thoughtful about where you use it. In my case with the Jell-o boxes, it was easy to position the archival tape on the inside of the box so that it wasn't visible unless you opened the box and looked inside.