[C320-list] Leaking portholes fix?

[Bill Sloane]

After 13 wonderful dry years, my 1998 Catalina 320 is starting to leak at
the LEWMAR operable portholes. At first I thought the leak was from the
black rubber interior gasket, but then I looked at the exterior aluminum
frame of the windows and noticed the gasket between the aluminum and the
fiberglass of the cabin top is also cracked.

Has someone had this same problem and fixed it?

Bill Sloane
Endless Summer
Catalina 320, No. 554
Olympia WA