Best thread sealant?
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Deere Dude
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I will generally use Teflon paste and seals most joints. If I feel like taking it apart again because of leaks or plugged valves I use Teflon tape. If I want it to stay sealed I generally use Locktite 242 for air, water, grease, paint etc. Hydraulics use another Locktite number others mentioned.,
NPT threads seal by deforming the threads. Flank to root metal. As mentioned, sealant is less effective then lubricant as lubricant allows the correct pressure between threads to be established without needing the 8 foot pipe on the wrench.
Per the other naysayers who are in love with this thread sealing system that wasn稚 ever really intended for hydraulics, the water in your house that痴 uses NPT pipe isn稚 3,000 PSI.
The other problem is the threads are tapered and I can稚 tell you how many cracked valve, motor, and pump housings I致e seen from over torqued NPT tapered threads basically splitting (wedging) them out
Look, I know it痴 everywhere and it痴 cheap and there痴 no reason to fix anything that痴 not broke.
Very few hydraulic component manufacturers even make NPT ported components , and those that do are only intended for aftermarket.
RoyKing
Platinum Member
Permatex fan aviation and number1 harding in a tube
300UGUY
Super Member
Loctite is what we have always used.
Why do all my posts change every punctuation mark into gibberish ?
flashpuppy
Silver Member
Find the stuff called Grrip. It's black and super sticky. It will stain your hands if you get it on them and is about impossible to get off. This stuff works well and is the only thing I use on hydraulics/pneumatics/water.
Hercules-Grrip- | Oatey
Hercules-Grrip- | Oatey
flashpuppy
Silver Member
I feel your pain friend. It is the apostrophe that is causing your gripe. Have not found a solution on mobile yet.
https://www.tractorbynet.com/forums/news-feedback/406225-what-deal-apostrophes-mobile.html
pmsmechanic
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So I guess I'm a minority here. I've always used Teflon tape on hydraulic pipe thread joints. I've rarely had problems with leaks and I've never had issues with the stuff in valves etc. We were taught, when I took my heavy duty ticket that you use 2.5 turns of the tape on a joint and you do not put any tape over the end of the threads. Also you do not install the tape against the direction of the threads. You always install the tape so that tightening the threads tightens the tape. A bit of care in installation prevents problems!
PILOON
Super Star Member
Once being in a bind I used a urethane caulking as a sealant.
It worked so well for me that it is my standard 'go to' product now.
Best yet is a large tube is affordable in the $5.00 or so range and I always seem to have a few tubes around.
It is very similar to windshield adhesive with same characteristics only less costly.
Also have noticed that 'offshore' pneumatic fittings generally are using epoxies to seal their fittings.
PS, I don't much like Teflon tape as I have split more things than I like.
It worked so well for me that it is my standard 'go to' product now.
Best yet is a large tube is affordable in the $5.00 or so range and I always seem to have a few tubes around.
It is very similar to windshield adhesive with same characteristics only less costly.
Also have noticed that 'offshore' pneumatic fittings generally are using epoxies to seal their fittings.
PS, I don't much like Teflon tape as I have split more things than I like.
