Leak economy: direct injection - refrigerant leak sealer - for systems up to 5 tons - compatible with most air conditioning and refrigeration systems - Proudly made in the USA, Small

Worked perfect just as advertised

My window AC has a micro leak... I can say it is very minimal leak, it slowly loses pressure for about 3 months but still not totally empty and can still cool to a minimal level. From 65psi, it goes to about 30psi in ~2 months and about 20 psi in 3-6 months. It will not empty out totally and will just stay at about 20psi. So, let us see how this works out for me. After 1 month i will check the pressure again, I know i will lose a little pressure every time I measured with my manifold and will consider this too. UPDATE: After about 20days of usage, the pressure dropped again at 20psi. meaning it was not able to hold the pressure and seal the leak. anyway i enjoyed using it and hope it can work for others

I used this Leak Sealer Small System injector on a LG dehumidifier running R410A that had a leak in the evaporator. It has been running for approximately 10 days now and is holding charge. It would exhibit low charge in a week or less before using Leak Saver. Very easy to use. Much more reasonably priced than other leak sealers. So far so good!

It got to me almost empty. It was leaking inside the package. Couldn’t use it.

It did something because I went past the time I would have had to recharge my car AC with more Walmart refrigerant. I had a small leak that progressed to where I had to recharge every two months. It's been more than two months since I used this product and the AC is still blowing cold (would have been warm by this time.) If and when I recharge, I'll update the review but so far so good. UPDATE: I sealed it on 1/26/26 and recharged again on 6/14/26 because it leaked out. Curiously, it only leaks out when my car sits for a few days. Came back from a five day trip and no AC. Refilled with Walmart r134a. We'll see how long it lasts. Next time, I'm going to put in some UV dye.