Quote Originally Posted by jotay
You can also use clear shipping tape.
That is what Boaphile recommends.

Metal/foil tape conducts electricity. So to be safe rather than sorry Jeff @ Boaphile uses and recommends clear shipping tape.

I have been using it and it works great.
If your heat tape is wired correctly, there should be no worries about the tape conducting electricity. I would rather use foil tape and get a small shock so I can fix the problem than to not know and have a big problem later.