I used a similar "peel and seal" product found at most aluminum fabricators. Was in a 3" roll with a white vinyl outer coating. Used to seal up the seams between insulated aluminum roof panels.
I used it on interior vertical surfaces of the truck, and also the roof. Made sure that I prepped the roof area to get rid of surface rust and cleaned it well with prepsol. The product has been on the roof for 6 months and is still as tight as it was the day I put it on.
Dave
