Tool related question: pneumatic thread compound

[Kraftwerk]

Looking for pneumatic thread compound.
Local Hardware store recommended Permatex Gasket sealant, the kind which stays pliable forever. It does work fine but I am worried it may be messing up the tools innards.

thanks

[Tidybuoy]

I've used teflon tape on the threads without any porblems.

[onewhippedpuppy]

Another vote for TFE tape.

[Kraftwerk]

Thanks. I will try that again. Had mixed results first time..

[Rot 911]

Same here, couple of wraps with teflon tape. No leaks.

[TerryH]

Teflon tape is the ticket. Wrap it in the same direction as screwing on a nut starting near the shoulder. Always leave the last 2-3 threads bare. Pipe thread is a tapered interference fit, so the last couple threads could shed the tape into your tool.

Probably more than you wanted to know...

[Porsche_monkey]

What are you trying to do, exactly?

There are many products far superior to tape, and many applications where tape is a really bad idea.

[sammyg2]

DuPont, the largest maker of teflon tape does not permit it's use on their hydraulic or pnuematic systems. It's also prohibitted in the refinery where I work ( by my direction).
It's fine if installed correctly (2 1/2 wraps, staying back 2 threads from the end, wrapped same direction as tightening) until the threaded connection is disassembled. Taking it apart causes thread slivers to get dislodged and can clog critical ports when re-assembled, even if you use more new tape.

Use a PTFE paste, teflon pipe dope. Use it sparingly. Put a little on the threads and wipe it all the way around and wipe off all excess. leave only enough dope to fill the roots of the treads around the middle. You won't have a sealing problem and you won't get crap where you don't want it.

[Porsche_monkey]

Bingo. Sammy gets a prize. Exactly why it should not be used a P-car engine, IMHO.

Use Loctite 592, or even red loctite, if you don't ever need to disassemble it.

[notfarnow]

Originally Posted by sammyg2

DuPont, the largest maker of teflon tape does not permit it's use on their hydraulic or pnuematic systems. It's also prohibitted in the refinery where I work ( by my direction).
It's fine if installed correctly (2 1/2 wraps, staying back 2 threads from the end, wrapped same direction as tightening) until the threaded connection is disassembled. Taking it apart causes thread slivers to get dislodged and can clog critical ports when re-assembled, even if you use more new tape.

Use a PTFE paste, teflon pipe dope. Use it sparingly. Put a little on the threads and wipe it all the way around and wipe off all excess. leave only enough dope to fill the roots of the treads around the middle. You won't have a sealing problem and you won't get crap where you don't want it.

This stuff?

[john70t]

Used the gelled pipe compound on fleet air-brake systems all the time. Hydraulic is probably different though.

Leave it 1/4in away from the thread ends and it'll be fine, the internal pressure at rest wants to push the compound out of the system.
Also, regularly drain the water out of the tank and oil your tools.

[TerryH]

I agree that removing a fitting that has tape on it could leave tape remnants in the port. For home use it's likely that fitting will stay in the tool for life. If tape is handy, and pipe dope isn't, use the tape and don't lose sleep.

Never in my life has tape been an issue in a tool. I can understand the problem in critical hydraulic or pneumantic components. Garage tools aren't critical. Loose tape would likely be exhausted out the tool.

[Porsche_monkey]

Originally Posted by notfarnow

This stuff?

Yes.