Wardster wrote:
Update
If that doesn't work, then they will remove the cab window and inject Sikaflex 252 into the void in an effort to resolve the delamination issue.
If the delamination was in the glue line, then one or both sides will be covered with the original glue, and anything injected in the gap will hold no better than the original glue. If the failure is in the core, then injecting something might get the core solid again. It would be interesting to look down in the gap if the window is out to see what the failure mode actually is. You might be able to get a snake camera in there. In any case this kind of repair attempt is less destructive and does not prevent more drastic measures, if required, later.