I have the sealed between the aluminum frame and the glass with Sikaflex caulking, painters tape and a steady hand.
Also the frame can be caulked with Acryl-R caulking. Anywhere there is a seam figure out how to caulk it.
What type of rivets were used? Hopefully they at least used Olympic rivets with a some sealant. The factory originally put buck rivets in all areas of the trailer.
Steve, Christy, Anna and Phoebe (Border Collie)
1994 Classic 30'11" Excella - rear twin
2009 Dodge 2500, 6 Speed Auto, CTD, Quad Cab, Short Bed
Hensley Arrow hitch with adjustable stinger
WBCCI # 3072