how to reseal a 41C module

[dmh]

I have a 41C HP IL module that it appears someone has tried to crack open.

The module actually still works and plugs into the 41C fine but needs to be squeezed together carefully as you are doing it so I'd like to make it safer and sturdier to use by sealing it back together somehow.

Can anyone recommend a glue or similar to do this?

I know many glues can damage plastic and this is old plastic so want to check with here first as I have never glued any part of a 41C or peripheral before.

TIA, dmh