I held the 'B' pillar cover on with the same stuff and it worked well until I secured it properly. Second lot I went to for yet another cracked screen managed to leave bolts holding the wipers loose and they stopped working on the freeway during a heavy rainstorm but luckily the bonnet stopped them from flying away over the roof.
I again fixed lousy workmanship myself.
They also made the interior 'A and B' pillar covers filthy and they were replaced by them ..... with clean hands to keep the new ones clean.
It's just a very basic job requiring little more than a bit of training and care for other people's property, so why it's so hard for the morons to do it right I don't know. Unless of course they're relying on the customer not complaining.
AlanH.