[Russell Ashley]

Orrie, it only goes on the threads to keep air from entering around the valve when using a vacuum bleeder. It never comes in contact with the sealing area of the bleeder valve. I too have never had one that leaked when tightened properly.

I use teflon tape on the threads of most every fitting, including brake and fuel connections. It never comes in contact with the fluid being sealed so I have never had any problems. It seems to make them easier to open when or if you ever need to.

I've never heard of teflon tape deteriorating but it opens an interesting discussion topic. Anyone else got an opinion?