After treating the metal, a length fof 1/2" dia. round foam weatherstripping (from the local hardware store) was applied to the bottom of the groove, partly to make future removal easier and to lessen the amount of sealant needed. Then a tube or two of butyl rubber sealant (again from the local hardware store) was used to fill the remainder of the groove. It was worked in to bond to both the glass and the sheet metal. Butyl rubber does not harden, so should retain the seal even if the glass and body move independently and yet still be easy to remove if needed in the future.   (2/5)