Hi all

So like many of us my glass is just starting to separate. Is razoring off the old glue and using 3M Window Weld still best? If so is the primer necessary? It is only a 10 inch area and I have no intention of pulling off all the glass and making this more of a project and I believe making more problems for me. Everything else is holding strong, for now. It is a garage queen rarely out in the rain and never the cold so just that spot should do it. Thanks in advance.