On 10/23/11 1:36 AM, DD_BobK wrote:

Teflon tape's major role is that of sealant.

No. The main reason people use PTFE is to lubricate the threads so that the
fitting can be tightened tightly enough to provide a seal.

Additionally, the material itself, be it PTFE tape or the grease that the
PTFE is suspended in, provide an additional highly viscous barrier (sealant)
to any small leaks.

Jon