how hard to reglue in 69 fastback front and rear windows?

What type of glue do I use? Is it the tar rope seal or an actual tube type glue? Thanks

I used the black urethane that's used to glue in the new windows. Just make sure you know exactly where to position the brackets. I made some small strips of rubber for shims and placed them on both side of the glass in the channel brackets.
Without them, the glass wants to rock back and forth. The shims keep the glass centered and secure.

Hope this helps....John