FlareSeal® Model MSP-0408 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) 1/2")

I love this product!! No leaks on my mini split installation. It gives you a peace of mind! way cheaper than having to recharge the system.

These seals are a little expensive, but they are cheaper than buying a long line set for a mini split and also cheaper than having your freon leak out and have to charge again. They were easy to install and they did exactly what they needed to do.

Helps with that metal to metal mating which is not necessarily easy or leak proof. Used on mini split fixed a leak issue. I recommend even on a new install saves problems.

I wasn’t able to use this product on the mini split head side of the installation. The male flares were too small on my Senville unit for the adapter to fully slide into position. It did however work on the outside unit service valves no problem. Seemed like good quality, but I needed up not using them and just used Nylog instead.

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.

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.

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!

These are fairly well designed, but they didn't work for my application. My Fujitsu mini split uses R-410A which requires high pressures. In my opinion, the pressures are too high for traditional flare fittings. I did the flares myself first, they leaked, so I assumed I screwed up. Then I had the pros do it, and their flare fittings also leaked. So I redid it once more with these seals, and it STILL leaked, but the least amount of any of the flares.Then I decided to braze the connections on the indoor handler, and then I purchased Mr. Cool fittings from Ingram's Water and Air to replace the connection at the outdoor unit. These Mr. Cool quick-connect fittings are the only solution that was totally leak free. Even though the others would not show leaks in a bubble test, my refrigerant leak detector would always show a small leak.Bottom line: these will help, but ultimately a different kind of connection is needed to truly remain leak-free.