I am in the process of putting this 68 bee back together and the rear pop out windows were taken out (not by me) and I am reinstalling them. My question is it looks like the main frame for the window had something as far as a sealant of some kind where the frame of the window and body of the car meet. Does anyone know what that is? Or what do I need to use putting this frame back in. I did post this question last week in a different section but no response so thought I would try here. Thanks again for all of your help. Jim If I am not explaining this right I can take some pictures to show what I am talking about