Glue to stick rear view mirror to windscreen?

[Guv]

My rear view mirror has fallen off so I need to glue it back on. I just went to Halfords to buy some glue but wasn't sure which was best.
I was going to get some instant drying Araldite stuff but then read the back and it said not suitable for securing rear view mirrors to windscreens.
Then I found some stuff specific for glass and metal, but again it said not suitable for windscreens!

Any ideas on what to use?


thanks

 

[Guv]

Sticky pads?

I've tried them before and they don't seem to be strong enough.
I used some extra strong velcro stuff before as well which held for a while but it's not great as the mirror wobbles a bit.

 

[Guv]

Halfords actually sell glue for that job alone - Ive seen it on the shelf.

Any idea what it's called?
I could go and ask but the people that work there never know anything