What's the best thread sealant from:
When I replumb my main water feed (replacing the temporary plastic and doing in copper) I will be including a pressure gauge on the end of an isolator valve to assist with setting the pressure reducing valve.
The gauge will have a 1/4" brass thread (parallel AFAIK) and I propose to use a soldered 15mm to 1/4" female coupling.
I have used gas PTFE tape on previous occasions with such gauges but I think a setting sealant would be better.
Ta :)
Tim