Non toxic adhesive for use when animals are in viv?

Ok I did try a search but there was a lot to wade through, perhaps some of you will take pity on me...

I mostly stick to silicone and foam, but both these are not safe for use when animals are in the viv. I have some elements I'd like to add to mostly completed vivs but would rather not hunt down every frog in there and these elements will be added so that the frogs can't actually get to the glue area, I just wanna make sure I don't poison them with fumes...

So maybe gorilla glue? Never used it, so I don't know. Maybe hot glue (if frogs can't touch it)?... any other suggestions?