FlareSealModel MSP-0406 Leak Free SAE Flare Connections - Refrigerant Leaks Refrigeration, HVAC, Ductless, Schrader Valve or Mini Split Applications (1/4", Mini Split Pack - (2) 1/4" and (2) 3/8")

Had a couple of flare leaks on a Mini split that would just not seal completely. They were fine under vaccum but had a small leak under pressure. Tried everything to get it to seal but nothing worked. Bought these as a final option and they worked great. No more leaks. The only issue I ran into was they didn't fit as easily on some elbows I bought from Lowes but got them to work.My guess is that people that these didn't work for may have not torqued properly.

A real timesaver! After trying half a dozen times to get the flare right my connection kept leaking. I grabbed these and it worked right away! They seem pricey for just a few gaskets but compared to the hours of time you save it is a bargain.

This product works great when the unit flare on the lineset is scratched or not sealing properly. it provides a gasket to seal the tiny leaks. we have used it several times and always fixed the issue.

Does what it's suppose to do so far

This is a great product

Still experienced a leak after using this. Flare was perfect and straight but I’m guessing this was deformed which led to the leak.

I installed a mini-split and found a leak where the line set connects to the indoor unit. As part of the fix I changed the entire line-set and then developed a leak at the outdoor unit. Even after multiple flare attempts and tightening the connections with a torque wrench I still had a slight leak (oil residue). After using the Flareseals I haven’t had a leak from the connections.

Bought these and installed in my DIY mini-split project, thinking it would be a perfect way to assure good seals in my line set connections. Unfortunately, I spent the next 3 months trying to find slow leaks in my system. After re-reading the negative reviews, I decided to remove all of the seals and reconnected the fitting2 using the tried and true method of Nylon Blue and traditional copper flare to brass, and like all the other disappointed reviewers discovered, I no longer have leaks. My advice is; DEFINITELY DO NOT USE THESE EXPENSIVE SEALS!