paper glues

[Heide Monster]

Before I started sending things, I generally stuck stuff down with glue sticks.  But after I had a couple of envelopes returned because labels fell off, I have been searching for the ultimate humidity resistant glue.  Any suggestions?  I am considering rubber cement.  I haven't used it in years but I remember it is pretty tough (tho' a little lumpy)

Thanks for any tips!!

[Mail Art Martha]

I manage with glue sticks, any one, as I mostly stick paper to paper. For shiny materials a drop of UHU (cement) in the middle and glue stick on the corners works for me. Anyhow the question arises: is it not the case that Mail Art  is ephimera?

My gold leaf, which I am using a lot now-a-days, is chocolate wrapper and the metalic layer comes stuck to paper, so it is fine with any paper glue. I eat chocolate every day, glossy, very  dark (85%) and delicious. Apparently healthy too.