Need a little help with a glass re-install....

[Groovie Ghoulie]

Ok, dumb question I am sure, but in the rear quarter windows, along the botttom edge was a black metal trim plate that ran the full length. If I remember correctly, it had a black rubbery substance underneath. I am getting ready to have to re-install all of this soon, and I was wondering if anyone who has some experience with this knows:

A.) The right stuff to use
and
B.) Is there a prescribed thickness for it?

Or is it kinda a "test it and see if it works" thing going on? I know its a dumb question, but I thought I would ask the brain trust over here.

[john walker's workshop]

3M strip caulk. auto parts or auto body supply store.

[Groovie Ghoulie]

well, that seems easier than i thought.

But thanks! at least it isn't something too hard.