Hi Eric,
  I don't know if the original is even available, but here are two possible
substitutes:
Gorilla Tape or real duct tape ( the aluminum kind).
  Also, it might be reasonable to protect it by spraying with rubberized
undercoating.

Larry A.

On Tue, Dec 10, 2013 at 9:53 PM, Eric Caron <ecaron1@comcast.net> wrote:

> Hi Listers,
>
>         OK, lets see if anyone out there can answer this esoteric
> question.  the undercoating on my 85 camper is in great shape.  However,
> there are pieces of tape covering openings in the frame.  these are
> starting to peal back.  I'd like to replace the tape but I would like to
> use the same stuff.  It lasted all this time so I'd like to use the correct
> tape.
>
> Anyone know what this tape is called and where I might find it?
>
> Eric Caron
> 85 Westfalia GL Auto
>