Leaking port lights

[daverippetoe]

I have a 1990 Hunter Legend 35.5 and am having a horrible time getting the overhead ports to seal. I've disassembled, cleaned, smoothed, and tried several different sealants. Was wondering if anyone had just glassed these in altogether.
Thoughts? Suggestions much appreciated.

 

[Project_Mayhem]

What material is the frame and/or port made out of?