Windshield seal rubber a floppin'

[bradleyheathhays]

I've got an old Taurus where the exterior windshield edge rubber has come lose on the passenger's side down to the bottom where it ends. I can't get it stuffed back into place so I'm just gonna cut some of the back off so it'll lay flat in it's groove and seal it down. What should I use? Silicone or a better weather proof adhesive? I'm thinking something better.