Brian, do you mean that white stretchy tape I used to put on the threads when I changed my showerhead?
I've been wondering about this, too, because I put a brass adapter on my sink for my Python hose to attach to. The light green plastic on the Python is already beginning to shred. So do I put this tape on the inner part of the Python's hose--the part that screws onto the brass adapter on my faucet?