Some months ago the rear view mirror in my car fell off - a common enough story.
Checking out the possible adhesives, I was feeling somewhat exploited at the combination of high prices (£4 to 5) and tiny quantities in the packs of special glues. (Typically people report at most two attempts from one pack.)
So I tried Evo-Stik Serious Glue - a 33g tube and I still have by far the bulk left (and have used it for a few other things) - about £5. Was rather cold when I did it, so it took a while to set. Other than that, no problem so far.
I _know_ that this will result in it falling off overnight...