Leak Saver Direct Inject AC Leak Sealer | AC Stop Leak for Most HVAC Systems Up to 5 Tons | Works with All Systems & AC Refrigerants | Made in the USA

I have used this product on my home air conditioning central air unit which is over 50 years old and it has stopped the leak in my coil and I have used their other product in my refrigerator and it has also worked fantastic.

So far this has been in my AC unit for two weeks and no leaks. Working great so far.

I’ve had a small leak that’s been getting worse over the past couple of years. Started as having to top off every season, then last year it got to where I was starting to lose 1-2lbs every 2 months. This year I decided to buy my own refrigerant and put this leak stop stuff in back in the beginning of April knowing that AC season was upon us. All I’ve got to say is WOW! I haven’t lost any refrigerant since I added this stuff and it’s now the end of September. It got me through the whole summer! Now I’ll be interested to see if the system loses any of its charge when it’s not being used over the winter, which is what’s unfortunately happened over the past 3 winters. Hopefully this time there’ll be no freeze ups when I turn it on next spring… we shall see! **April 16, 2026 update**- It’s now been a year. So far we’ve had 10 days of 80’F+ with 3 of those days being over 90’F, including today, and the AC hasn’t struggled at all. Intermittent flashing noises near the indoor unit did return on the first run of the season about 3 weeks ago, but it only happens every 30 seconds or so. That tells me that it likely lost a few ounces of refrigerant while it wasn’t running over the winter, but it’s not made any impact on its ability to cool and is much better than the usual 2-3lbs of refrigerant it would’ve lost over the winter in years past. Performance is still the same as it was right after I added this stuff along with 3lbs of refrigerant last April. Delta T is averaging 16’F-18’F and cooling cycles are 10-20 minutes. It also still manages to cool the house down 3’F in less than an hour when my thermostat switches the temperature to sleep mode at night. I’m very pleased with how well this product worked and that I seemingly no longer have to deal with a frozen system on the first hot day of the year.

The good news is that the leak sealer appears to have worked for my home AC system that was losing refrigerant slowly. The bad news is that this is NOT a simple process. I consider myself fairly handy, I have renovated bathrooms, I have tackled plumbing and electrical projects, I have done numerous carpentry projects, but I have never worked with HVAC systems before. Despite the instructions seeming simple and straightforward, I still managed to screw up and sucked some air into our AC system. If you are using manifold gauges and hoses for the first time, do yourself a favor and watch as many youtube videos as you can. Follow the instructions EXACTLY, TO THE LETTER, and DO NOT DEVIATE from the steps or the order they are in.

Do not buy; Leak Saver does not work. I normally use Easy Seal, but this time I decided to try Leak Saver because of the cheaper price. The product went in very easily without any problem. I ran the product for over 24 hours. On the second day, I noticed the temperature was hotter in my home. I checked my thermostat; it was reading 82 degrees. I went to my unit and visually checked around it. Then I spotted it: the infamous frozen line. After a few curse words, I got back on Amazon and ordered what I know works; I ordered two packs of Easy Seal, I kept one pack as a backup. I serviced my unit. On day 5, my unit is still holding with the Easy Seal in it. I shall never purchase anything else but Easy Seal for my old AC units.

Delivery as promised & product seems to have corrected the issue.

Easy to be used and connected easy, the leak has been fixed. The only concern is that I am not sure it will make TXV bad or not or other parts be clogged

This Leak stop fluid is well packaged and seems easy to use. Initially it was purchased for emergency repair on a failing unit. The evaporator ended up having major pan issues and other problems as well and was replaced before the leak stop could be used. Will keep it to be prepared for next time. I've used this product in automotive applications with very good results.

The product made the promise! Highly ecommended.

I bought this and put all 3 in 4 tons ac , not any work at all Wasting time and money DO NOT BUY

Easy to use and in works. Has been in system for nearly a month and looking good.

I used this product on 5 different systems with micro leaks . Unfortunately it did not seal the leaks as I was expecting. Was very easy to get product into sealed system.

C'est un produit exceptionnel. Prenez le temps pour qu'il seale toutes les fuites de votre système. C'est fantastique.