Best thread sealant?

[4570Man]

I’ve got a double ended pipe fitting between my wood splitter valves and due to not being able to completely tighten it it leaks. Is there a better sealant that won’t leak or should I take it apart and use put a jic fitting in it?

 

[CalG]

Permatex Aviation joint compound.

 

[100 td]

My .02
Ptfe/others are designed to fill the minute gaps in threads which are installed tight. This joint is seeing (guess) 2000 psi, most likely pulsed, unless it's tight, it won't seal, or the sealant(whatever type, unless quick metal or similar) will eventually leak/be moved from between the surfaces. If you have room to remount and have a male and female JIC, I would go that way for longevity. You'll need ptfe or you preferred sealant on the threaded fittings to the valve block, but you'll be able to do them tight, then hold the male and tighten the female JIC. YMMV

 

[RyeThomas]

Loctite helped me with my hydraulic line install. Only issue is they recommend 72hours for full cure.

 

[4570Man]

I bought the stuff to fix it. The JIC to pipe fittings were a little less than $10 so if that fixes it I’ll be happy.

 

[Dadnatron]

I moved from plumbers tape to Loctite thread sealant.

Doesn稚 break off and go through the system and screw it up. Use immediately. I put it on all hydraulic connections. No leaks thus far and VERY easy to use. I like it much better than tape any day of the week.

 

[LD1]

x2 on loctite 545.

For hydraulic fittings there are also NPSM fittings. Similar to JIC but pipe thread.

 

[4570Man]

Upon further investigation I think poor threads were the cause of the original issue. One fitting went in a lot farther and looking at the fitting that came out the same thing happened. I’m taking it back apart tomorrow and running a tap in it.

 

[nyone]

Teflon tape is not good to use on hydraulics. The tape can come off in the system and get stuck in ports and valves. Use a liquid sealer or no sealer.

 

[4570Man]

I don’t usually use Teflon tape. I hate the stuff. That was provided with the machine and it was much thicker than regular Teflon tape. That’s the only joint that leaked so it must’ve been pretty good.