I used the RTV on my 52 panel wing vents because of the problems with glass tape.

I really put the stuff on heavy, slide the glass in and then "seated it" against the rubber vertical piece. Had a little bit of a mess to clean up but it never leaked the 7 seven years I drove it...and in quite a bit of rain!

1937 Chevy Pickup
In the Gallery
1952 Chevy Panel
In the Gallery
More photos
1950 Chevy Coupe
Pictures!

I'd rather walk and carry a Chevy hub cap than ride in a Ferd.
I can explain it to you, but I can't understand it for you smile