Can I use RTV as Pipe Thread Sealant?

[BILLYGEE]

Permatex Hi-Tack did the trick

Had a problem just the other day with that pesky grease gun hose to the sender. Finally coated the threads with HiTack by Permatex. Took care of it. Says thread sealer on the can besides other things like sticking gaskets, etc.

 

[viper700]

Ryan

Glad to see that you ordered a new fitting. I used to work for a large hardware company and sold a lot of brass fittings. When you take it out again clean it up real good and look very carefully along the threads. I have see them where you will have a little black line through the treads and it will be a very small crack and will give you a lot grief for leaking. I have always used a teflon based pipe dope and stayed away from tape. As someone mentioned previously start 2 threads up with tape if you don't a small piece of the tape can break off and plug something up.

 

[CPG]

DAWG-1 is correct in not winding the teflon tape on the first several threads of any pipe fitting.

Have been retired for 18 years from the HD truck trade. Had many instances of the teflon tape getting into the fuel systems of the older Diesel engines. We changed to liguid teflon when it came out on the market.

Permatex thread sealant is very good. It will stand up well against vibration and not dry out. Comes in a small . 20 FL. OZ. tube and is white.

 

[thejeepdude]

We changed to liguid teflon when it came out on the market.

So if someone were to dope up the first 2 threads of their FP fitting and it introduced a bit of this teflon based dope into the fuel system, I would assume it would just get diluted until it all passed through, rather than clogging something up. Is that correct? And since it's teflon based, it shouldn't cause any marring or scuffing to the fuel pump internals, right? Although I'm not sure what other ingredients are in this stuff, but I wouldn't think a small amount would matter...

 

[CPG]

the jeepdude,



More or less correct. The old truck Diesels had an average rail pressure of from 290-300 high. Believe it or not, they were called common rail in those days but not 23,000 or so PSI like our new trucks. The teflon would come off in small micro pieces and lodge in the injector orfices. I'm an antique now, but must say these new engines are something else. Just down right amazing compared with a few years ago.

 

[phicks]

The correct method for installing teflon tape is to wrap the direction of the threads three times making sure the first three treads are covered. Pipe dope, or thread sealant such as Rectorseal or Gasoila is first stirred then can be applied over the teflon tape. Use sparringly, then apply and tighten fittings.

Been doin it for 30 years in high pressure Propane applications from 1/4" to 4" with no leaks.

 

[nickleinonen]

the jeepdude,



More or less correct. The old truck Diesels had an average rail pressure of from 290-300 high. Believe it or not, they were called common rail in those days but not 23,000 or so PSI like our new trucks. The teflon would come off in small micro pieces and lodge in the injector orfices. I'm an antique now, but must say these new engines are something else. Just down right amazing compared with a few years ago.

the PT cummins system was called common rail at times, like the newer hpi-tp system. but rail pressure in them is low [like quoted ±300lbs] but that new hpi-tp system can get higher injection pressures than we normally get. it can get to over 30,000 when running hard