[Cliff R]

"Count me among those who won't use teflon tape. I've had 100% success with Loctite 567 pipe sealant over a lot of years. The stuff Cliff recommended is probably equally as good."

It's the same product, just a different manufacturer. I discovered it in the Federal stock system back in the late 1980's and have been using it every since. Tossed out all the teflon tape.

The PTFE is a thick liquid and an anerobic, and having teflon in it allows for improved lubrication when tightening things up provided more engagement and tighter sealing on the threads.

I beleive this is what we used in the Military:

https://nationalstocknumber.info/nat...30-01-166-0675

Trust me on this one, once you start using it you'll never mess with any pipe dope or tape again. I used it on my entire boiler system and also on the black iron pipe propane system in my house which supplies the furnace, hot water tank, and fireplace upstairs. Used it recently to plumb in some new lines at my daughters house to supply gas to a new range top we installed. I've never had a leak and trust this product any time NPT threads are involved in plumbing something in........

[JSchmitz]

Nothing wrong with good old Teflon tape if you know how to use it properly. I use it when I don't want the white goo getting all over. I do like Loctite 567 and Chesterton 900 Goldend. Paste is essential when dealing with stainless steel tapered pipe connections.

[Schurkey]

Originally Posted by lust4speed

Only gripe I have with the Permatex thread sealant is it gets really thick after a few months. Anyone know of a thinning solution?

WHICH "Permatex thread sealant"?

The "Teflon/PTFE" brush-top tubs (NOT anaerobic) contain ethanol and methanol according to what's printed on the back-side of the tub, so if they're too thick, add one or the other...or both.

If you're having thickening problems with one of the many variations of Teflon/PTFE" "PST" anaerobic sealers...leave some air in the tube when you're done. Don't squish it flat.

Originally Posted by lust4speed

A surprising winner for thread sealant is Gasgacinch. Was at the track with just that to use and it worked great.

Gasgacinch is liquefied neoprene rubber in a solvent carrier. I REALLY like it as a gasket sealer/dressing. It does almost everything that Hylomar does, at 1/10 the cost. Maybe less.

Originally Posted by Cliff R

"Count me among those who won't use teflon tape. I've had 100% success with Loctite 567 pipe sealant over a lot of years. The stuff Cliff recommended is probably equally as good."

It's the same product, just a different manufacturer. I discovered it in the Federal stock system back in the late 1980's and have been using it every since. Tossed out all the teflon tape.

The PTFE is a thick liquid and an anerobic, and having teflon in it allows for improved lubrication when tightening things up provided more engagement and tighter sealing on the threads.

I beleive this is what we used in the Military:

https://nationalstocknumber.info/nat...30-01-166-0675

Based on the "400 degree" temp rating, I believe that this is repackaged 592. But that's a guess, not a confirmed fact.

Originally Posted by Cliff R

This is what I use here when working with NPT fittings, whether it be for the house or automotive. Been using it at least 30 years now and tossed out all the teflon tape once I discovered it. I just used some the other day to install a new hot water plate exchanger for the boiler. Never had a single leak since switching to it.......:

https://www.autozone.com/sealants-gl...E&gclsrc=aw.ds

This stuff--in a tub, usually with a brush spot-welded to the cap--is a "Teflon"/PTFE-based product, but NOT anaerobic, and is NOT anywhere near as good as the Teflon/PTFE-based anaerobic stuff. This "tub" stuff thickens when the solvent (alcohol) it's mixed with evaporates. The anaerobic stuff hardens like threadlocker.

As best I can tell, Permatex and Loctite share some product lines. A person can buy "592" from either company. Again, as far as I know, the Genuine GM thread sealer, the ARP thread sealer, and the military stuff referenced above are all "592" in custom-packaged/custom labeled tubes.

Other anaerobic sealers include but are not limited to 565, 567, and 504467, a "chapstick"-looking semi-solid waxy-kinda product. There's others as well. Some are advertised as slow-setting, fast-setting, high viscosity, low viscosity, low-strength, high temperature...you get the idea. Neither Loctite nor Permatex is particularly good about advertising which product has which qualities, or is most-suitable for which application, EXCEPT that "592" is well-advertised "for Automotive use". Some listings for 592 specify "low pressure", but that's when first applied. Once fully-cured, it'll hold up to the burst rating of the threaded fittings it's applied-to. Have NO fears about "low pressure" in any automotive application, even when freshly-applied.

All of these have a distinctive "chemical" odor which I assume is the anaerobic part of the mix.

[flat-bill]

Permatex #2 will be cut/thinned with alcohol. Billk

[HWYSTR455]

I use the Permatex 56521 stuff because it's sensor safe. I use it for everything now even if it doesn't require grounding. Makes it easier for me to not muck it up.


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