plastic weather sheet adhesive for door panel?

I am in process of installing the plastic sheet that goes under the front door panels in a 69 AMX.  Memory says that the factory used some goo around the perimeter to attach the plastic to the door metal before the door panel was snapped on.  The goo never really got hard and in the future one could pull the plastic off, do work on the window mechanism and reapply the plastic w/o more goo since it was still tacky.  When I had the car repainted back in the late 80's we removed the goo.  Any ideas what is the best stuff to use that resembles the original goo?

 3M Strip Caulk (3M part # 051135-08578), a/k/a "dum-dum" works great for this application. It is has many uses including sealing around openings in firewalls. Note, several AMC vendors sell the correct pre-cut door and interior quarter weather shields- if you want to keep the factory appearance.  Bruce

Thanks everyone.  I think I'll try the Dum Dum stuff.  I like the name!  As for factory appearance I'm into that a little but am really thinking more about the original ability to peel back the plastic in the future and it seems like the Dum Dum will do that...

My early build 70 had the string caulk and tar paper moisture shields. 

Just a quick question: you didn’t mention the reason for having the doors exposed, and I’m curious if you installed new door panels. Just curious, entertaining the idea of installing new door panels on my 68 AMX.