I use T+2 all of the time for threaded gas and water piping, but I've never used it on a flare, or in a refrigeration system.

When you say you were using it to seal up a leaking flare, what exactly are you talking about? Do you normally smear Nylog all over flare threads and mating surfaces? I was taught not to ever do that, but I guess if it's leaking and the job needs to get done, you gotta do what you gotta do.

Personally, I wouldn't think T+2 would be a very good choice for a sealer since it's kind of grainy, and like most pipe dope, is mostly designed to be a lubricant.

 

I use the T2 as well all the time. For gas and oil. A flare connection doesn’t require any sealant? I also use nylog, for pistons, txv, shraders, etc. A flare should not need sealant. If it leaks try a new fitting, or new flare nuts, or remake the flare. This is why a good flare tool costs more than 20 bucks. Good tools make good leak free flares. Just saying.


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I should clarify that I applied the T2 to the male fitting only and the product did say it was safe to use for refrigeration applications. The flare fittings were for the TXV and came with the coil, the issue wasn't originally a leak so I can't imagine the problem was with the fittings. I really don't deal with flare fittings much at all and never had to use anything until I found a joint that would not seal on a trane install we were on about a year ago in the middle of the night. Also on this job being a weekend, getting late, and having to get the client up and running asap I couldn't think of many options besides throwing pretty much the only thread sealant I could get my hands on at that time on there and it did work but like I said I'm concerned about what's going to happen in the future. Oh, and the exact fitting I'm talking about was where it met at the aluminum distributor.