Thanks for the ideas guys.
I will check HD again, most of the stuff that I have found in the insulation department was relatively thick @ 1/4"+ which I was hoping to avoid, but may just have to go with it. Do you think that is really necessary anyway?
Any suggestions on which 3M foam tape it might be? Model#? There seems to be an endless number of them, none of which appear to be the right one. Maybe I missed it.....would not be the first time!
This is for a 1998 FWC Ranger II that I am rebuilding if that helps. The foam is very thin,and is all along the top rail of the camper on the inside. It appears to be more for preventing condensation on the aluminum and protecting the side liner than anything else.
Thanks again!