Leak Lock

[hands]

I finally found some Nylog and plan on using it soon. I got the HFC type even though I will be using it on a mineral oil system. I read that it is semi compatible with mineral oil. I don't plan on getting it inside the system anyways.

[STSMech]

Has anyone found a thread sealer for refrigerant fittings that is better than Leak Lock. Over the years I have found a lot of refrigerant filter shell covers that have leaks around the threads of the brass MPT connectors. I have always used Leak Lock on the threads in the past and sometimes it works and sometimes it doesn't.

Dont know which shell your working on (sherman?.) maybe new gasket/oring and proper torque and sequence? Only asking, never had to use a product on a shell cover. However I have seen Nylog on compressor head gaskets. I imagine that would work.

[y7turbo]

Something I've never heard anyone say about Nylog is that it should be used WITH thread tape on NPT fittings. This is from the instructions on Nylogs website.

I use Nylog on flares and gaskets and a few other things like assembling txv's. For NPT fittings I use leak lock, it always seems to work just fine. Follow the instructions and allow it to set for a few minutes before assembly and I've never had an NPT fitting on a refrigeration system leak.

[valdelocc]

Leak lock for schmoes, nylog for pros.
End of discussion

ohhh my god I need some nylog, I'm not a schmoe, nylog...nylog... better than slice bread, I'm running to the store ... must get some nylog... nylog ohhh my god nylog I'm not a schmoe

[slctech]

Dont know which shell your working on (sherman?.) maybe new gasket/oring and proper torque and sequence? Only asking, never had to use a product on a shell cover. However I have seen Nylog on compressor head gaskets. I imagine that would work.

He was talking about the brass 1/4"SAE access port fitting that screws into the head of most large filter shells, not the shell seal itself. Even though I personally put a small film of nylog on the new cover o-ring gasket before I bolt the head back down.
I just have made it a personal habit to use it on any gasket, O-ring, any threaded item, valve caps, or whatever it may be that is trying to prevent refrigerant from sneaking out. Stuff is truly Nectar from the Gods.

[hands]

Dont know which shell your working on (sherman?.) maybe new gasket/oring and proper torque and sequence? Only asking, never had to use a product on a shell cover. However I have seen Nylog on compressor head gaskets. I imagine that would work.

I'm talking about the threaded hole in the cover where you can install a access fitting. I have seen at least 20 shells with leaks around the access fitting that had Leak Lock on it.. I usually remove it, run a tap down the threads and install a new fitting with Leak Lock. Sometimes it seals and sometimes it doesn't.

[ACFIXR]

Something I've never heard anyone say about Nylog is that it should be used WITH thread tape on NPT fittings. This is from the instructions on Nylogs website.

I use Nylog on flares and gaskets and a few other things like assembling txv's. For NPT fittings I use leak lock, it always seems to work just fine. Follow the instructions and allow it to set for a few minutes before assembly and I've never had an NPT fitting on a refrigeration system leak.

All of the "leak stoppers" have their ideal application like y7turbo said.
I carry and use at least 3:

1. Nylog for mating surfaces.
2. True Blue for pipe threads.
3. Leak lock for leaking glands,"pack them glands and pack em good boy".
4. lock tight for SAE/metric threads