How do I seal my windshield on 67 Barracuda?

The 67 glasses I have removed had the black sealnt at gasket to body and a samll amount of greyish bedding and glazing compound ( like used in houses wooden window panes ) between gasket and glass.
Regardless what you found in the removal or what you use, you do need something there. Water standing at the raw edge of the glass is what causes it to seperate and/or turn milky colored.