Okay, I have seen references to "heat shrink" and from the context it would appear that I would use this where I would normally use black electrical tape. I have the below link which I think is what you are talking about. How does one use it? I assume it comes in a tube and you slide it over the electrical wire you want to protect, but then what kind of heat do you apply to make it shrink? Also any hints or tips for using it? Pros or cons over electrical tape? Thanks!
http://www.jameco.com/Jameco/catalogs/c121/P57.pdf
-John