I just tackled this problem in mine. Granted, I did this as a temporary fix until I have time to pull the window and do a complete butyl putty tape replacement, but for now I did the following.
- Cleaned up the old caulk and reinstalled the rubber gasket (mine did the same thing, it pulled away from the corner).
- After cleaning everything up and reinstalling it firmly, I re-caulked every nook and cranny that I could find, both around the metal frame and along the gasket itself.
- After it all dried, I applied a strip of Eterna Bond tape (black) around the entire window frame.
Hopefully this will keep me dry until the end of the year when I'll then do the complete removal.
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Gulfstream Yellowstone
USAF Veteran
US Army Veteran
Retired LEO 34 years