This is something that I've never actually bought or used before so am looking for guidance. Are there basically just two types, fabric and PVC? I take it that one would be used over the other depending on if you want heat or water resistance. Any recommendations on a make/brand in general? I don't have a particular job in mind at the moment, I have used insulation tape and heat shrink tubing for years now, should add some of this stuff to it.