The quote is from an old thread about adhesives, but gives my personal experience with repairing my radio surround.
This video demonstrates the process. They recommend GOOP Automotive adhesive. I used Flex-Seal. Mine was white, but I believe it also comes in either black or gray which would be more suitable for our interiors in the event any squishes out enough to be visible.
https://youtu.be/Y6DlY2FZeHI
