I've got a small pocket closet in a study right next to where I work that is actually a partition of a hall coset in an adjacent building entrance, and therefore not well isolated from it. Recently someone using the adjacent entrance piled some clothing for a few days in the hall closet that appears to have been exposed to mothballs, and the smell lingers. I don't really need my bit of the closet and would like to seal it off so that the mothball smell doesn't get through. I'm a renter (and not handy, and can't have a crew over under current circumstances) so I can't do anything permanent or complicated.
How do I seal off a small closet temporarily with so that the smells there don't leak into the adjacent space? Perhaps there's something I can tape around the opening (a few layers of some airtight material perhaps)?