Preferred pipe sealer??

[TractorLegend]

so the seal nuts go on over the male pipe then install QD fitting and then tighten seal nut against QD fitting??


Isnt yellow pipe tape designed for natural gas connections?? Probably works none the less

 

[Mith]

I cant tell you whats good, becuase I'll be going out and trying some of the suggestions in this thread.
I can tell you though, that 'dowty bonded seal washers' are useless! I used them on all the fittings on a valve block, and they leak so much it makes a puddle on the running board of the tractor.

 

[Reg]

I'll tell ya what works really good. It's those Seal Nuts you can get for NPT threads.



At least they work great for me, so I don't know what your individual experience is with them. I used them on my cylinder connections where I couldn't screw the NPT into the elbow too much, or the other end of the hard line would come out of the compression fitting. So I used Seal Nuts for the NPT there.



You can see it on the left of the elbow on the cylinder. I only had the NPT thread in the elbow hand tight and used the Seal Nut to seal it off. They are a bit pricey, but Zero leaks! They compress down over the threads to seal as you tighten them up.

I get mine at Discount Hydraulics here:

SEAL NUTS @ DISCOUNT HYDRAULICS

NICE, thanks for the tip.
Seems they would be just right for where you have an elbow that you want pointed exactly right, but tight right is 180 degrees away and aimed just right is too tight.
I'll get a few to keep on hand.

 

[3RRL]

NICE, thanks for the tip.
Seems they would be just right for where you have an elbow that you want pointed exactly right, but tight right is 180 degrees away and aimed just right is too tight.
I'll get a few to keep on hand.

Yeah Reg,
That would be a perfect application.

 

[bjcsc]

Isnt yellow pipe tape designed for natural gas connections?? Probably works none the less

Yes, that's exactly what it is made for. You can usually find it with the gas fittings/pre-made hoses. But it works great for hydraulics. That's what I use and have had zero problems so far...

 

[HangarDebris]

I see that this is an old thread but would like to mention a product I have used for years to prevent nuisince seeping type leaks for any type oil conduit. This product is availble at some aircraft supplies as I discovered it for use in my airplanes oil lines and fittings and it has always performed a finish seal where the intended sealed assembly is otherwise properly assembled. The product is "Seal Lube" and usually comes in a pry top can like paints and stains and has a cosisstency of a heavy wheel bearing grease. It really works too. I actually think it was developed for the farm impliment industry but not certain about that. A little goes a long way so a 1/2 pint can may last you 10 or 20 years.

 

[3RRL]

I did a search.
Is this what you're talking about?

Seal Lube for Threads

 

[Wayne County Hose]

Guys, just an fyi. Directly from Brand Hydraulics product literature.


"Pipe Thread Sealant:- Warranty is void when teflon tape is used to seal pipe threads. This is because teflon tape is a friction reducing agent which allows customers to overtorque fittings. We recommend using a sealant that does not include friction reducing agents i.e. lead plate"

 

[HangarDebris]

I did a search.
Is this what you're talking about?

Seal Lube for Threads

Nope, that isn't it. However Loctite may have procured the name.
It is like a grease (a little gritty). I will try to locate it and get the info from the can. However I have a hard time finding my reading glasses most the time and my garage is in disarray. I'll look anyway, it kind of like Christmas finding stuff I forgot I even owned.

 

[kennyd]

However I have a hard time finding my reading glasses most the time and my garage is in disarray.

And you fly airplanes?