Which butyl sealer for back glass?

In all the cars I’ve replaced glass - and trucks with the same style gasket with filler insert. The sealer butyl goes only between the gasket and glass. The gasket is what seals to the pinch weld. Possibly why so many rot out due to water sitting there and never drying out. A foam tape would just hold more water.
Also I believe the foam was used only on cars with vinyl tops. Very thin stuff so the install guys on the line who some were drunk- lol! Did not damage the vinyl top.