I wrapped all of my harnesses in this loom, not just the engine harness. It's held up very well, even in the front wheel well where the headlight harness runs.
I just meant the self-amalgamating tape that mygasser referenced.
I like the F6 loom, only drawback I can think of is if you wanted to give the harness some shape. I guess if I wanted it to go around a corner, I could wrap just a section with the Tesa tape to give it some shape and then cover it with the F6 loom. Not certain I would need to do that, I just know the Magnum harnesses I have worked on had corners built into it.