Anyone have some practical advice before this gets any worse?

Is there a specific bonding agent I should use to try & reseal it back together?

 

Thanks for any tips you may have.

 

Hi Tony, I have, thankfully, not come across this snag yet - but this turned up in my feed a couple of weeks ago and may be of some use?

Mike 😎

How old is the car? I'd be speaking to Audi if still under warranty. 

Since the extreme heat our roof has done the same. Spoke with K.Baggs Trimmers in Poole, they said had been seen loads due to the heat. Not just with Audi. Also said cannot be fixed if it's gone at the top.  They do have a clamping system for rebonding but only if the bottoms gone. New roof time is what they told us. Good luck.

If the only recommended solution is a new roof, then you have nothing to lose by trying to glue it back. The bath sealant type of silicone mastic is a good adhesive if you can clamp the joint while it cures, though I have not used it for this particular repair.

Be aware that many of those silicones are stabilised with acetic acid (vinegar), the fumes of which can corrode adjacent metal parts so ventilate well.