Pop out gasket

I am not understanding the question. The glass is in it own frame which seals against the quarter to prevent leakage into the quarter panel. Although there is weep holes in the rocker to let water out. One reason they always rust at the lower quarter. I fill the rocker with chassis saver up to the top of the rocker at the quarter and drain it to prevent future rust out after repaired.
Thanks for your reply I was thinking the window seal might lay on top of the quarter panel like newer cars I just could not remember after putting the new quarter panel on. Thanks KB9GIB