installing rear window in my Duster "?".

What do you use in the channel that the glass sits in, in the glass rubber? Is their some kind of adhesive or sealer? I'm thinking their is but I can't remember what it is.
A little help please.

I just did this in the FrankenDuster.....
NO sealant. I used wd-40 to act as a lube though.....

On this topic ish... how successfull would attempting to remove the rear window and save it for reinstallation be? my car has to go back to the painter and I've got nearly every window out except the rear...the front I was replacing so I didn't care if it cracked on the way out.. the rear though, yikes I don't wanna kill it

thanx in advance and sorry for the thread tangent

The rear on my 74 Duster had a locking strip in the black gasket. I'm not sure if all Duster/Demon/Dart Sport cars had the same design from 70-76. I have pulled several rear windows out. I always cut the gasket apart and pulled the glass out that way. When I recently replaced the rear window in my FrankenDuster, I was careful to NOT damage the rubber seal. This was my first rear window install. ZERO leaks too.

I have a new rubber seal to work with. I was recommended this to put in the out and in side channels of the seal, prior to installing the window.

I would think that if the manufacturer suggests it, they may have a point. I have only installed ONE rear window. I used no sealant and it doesn't leak. Maybe I got lucky.