Windshield seam sealer? What to use.

What year B body. This appears to be a 71 or newer. The glass on those is glued in with urethane adhesive. 68-70 charger rear glass is glued in as well

To do this the right way, you need to pull the glass, strip all the rust out of the frame, epoxy primer and paint the window frames, install new moulding clips, then glue the glass back in with urethane windshield glue. Otherwise all your doing is a bandaid fix. Regardless of it being in a dry condition, used only on nice days etc, your still going to wash the car, water is still going to lay in these areas at least till it dries. If the windshield has flaws, now would be the time to glue in a new replacement.