Windshield install help needed still water

[ertech]

Hi guys
Installed a new windshield seal on my late 89 930 ( same as 964 seal) the corners were not sealing to well so I replaced it with an original porsche one. A little better but still seams to small and water gets in
I was told to use a 3m bedding compound.
Do you guys use this stuff and how do you use it?
Thanks
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[3literpwr]

I've used the 3M product on all my installs. I shot it under the lip and into the corners and the corners took a bit. I then used a block of wood and mallet to drive the seal in the corners. worked like a charm.