What is the "application tape" mentioned in the EasyHeat installation instructions?
It looks like there's a particular product available, but I think that it's also a generic term for any tape that meets their criteria. From the instruction sheet:


  Application tape (Cat.No. HCA) or high quality electrician’s
  tape such as Scotch 44 or 33.


And...


  Only use ½" or 1" vinyl or fiberglass tape to attach cable to pipe


Of course, most readily-available electrician's tape is about 3/4" wide, but I imagine that would work fine.