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 same leak sealer several times over the years. What I have found is that this runs a tight 1st place with the "top of the line" leak sealers on the market. If you know how to properly install this, it is easy to use and the application is simple. It can save professionals a lot of money that can be transferred in lower invoicing for long-term clients, leading to retaining clients at a fair price. It is not a "cure all", meaning it works as designed but will not seal large leaks beyond design so if the leak persists after application then the fault is too large and will need mechanical replacement of lines or parts. As an aside, I have never once experienced clogging of any cap tubes when using this product but have had good success in saving my clients large amounts of money in times of uncertainty. Hence the reason why I prefer this brand. Thumbs up!!! and 5 stars!!!

Did the job perfectly, and was simple to use. Very cost effective for sealing leaks, and saved me about $1200.00 in parts and labor it would have cost me to have a HVAC company to make the repairs, although to use it, you do need some basic knowledge and skills, along with some necessary tools, equipment, and supplies. As far as durability, only time will tell the story on that, but it has been several days now, and my system is still functioning as it should and there have been no issues to this point. Extremely pleased with results so far. Very highly recommended product.

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.

It definitely slows a leak down a loy. I've used it 4 times so far and it definitely slowed the leak. I am finally going to get a new AC. It did make my ac not lose all the freon as fast as it was.

Final update: The replacement unit worked as advertised and all is good. Ordered another unit for future use. After posting the original submission, the company contacted me and offered to provide a replacement free of charge. They below there may have been a faulty Schroeder valve (the valve that opens when one end is screwed on tight to the fitting). I haven’t been able to try the replacement yet. However, any company that believes in their product enough to offer a free replacement warrants at least a 3, or neutral. Will update the review after using the replacement Original submission: Tried using this per the included instructions. First tried putting it between the 410 tank and low side. No 410 would flow and the fluid in tube was static. Took the “leak savor” out of the system and filled it with 410 up to the prescribed amount by the manufacturer. Then turned off the compressor and inserted this thing between the gauge and low side. Turned on compressor and carefully opened hi side to try and force the fluid from the tube (per the instructions!). No effect! Then, thinking maybe this “leak saver” may be directional in operation... I turned off the valves both sides and the compressor. Then reinserted this thing into the hi side hose but now in the reverse direction. Turned the compressor back on and opened the high side valve again...no change. While picking up the leak saver one of the ends loosened slightly and then the tube became empty real fast! Don’t think anything went into the HVAC systems but I did lose about 25 psi on the high side. The pressure difference in the system was around 250 psi when trying to empty the tube; 360 when the connector loosened slightly. Based on the directions, the pressure needed to force the fluid from the tube should be around 100 psi or so. However, by accident I found that it would empty when it exceeded 300 psi! Now I have to find an alternate solution and reconnect the 410 to add a bit more to the HVAC system.

I’m a Florida State licensed CAC contractor. These leak repair dye packs are junk! I got them for spares and just took one out of the package and the dye pack has leaked into the foil packaging and it’s to late to return.

Ok please read my back story. I'm a handy guy, I can fix almost anything. There are only two mechanical things I am not experienced in. 1) Automotive transmissions and...2) Home HVAC. I know the basic principle of home HVAC but never had the tools to work on it or guidance to teach me. Anyway, I have a house on the water, ocean access water in the Ft Lauderdale area. The AC on my home is a 20 year old 4 ton Rheem unit, R22 and exposed to salty humid air. It cools fantastic but over the years there have been a few leaks on the U tubes on the condenser coil (the outside unit, high side) and I had a long time AC guy that has welded the leaks and got me going. This last time a couple weeks ago the AC guy basically told me "my AC is shot I need an entire new system and he can't and won't attempt another repair, the cost of a new system is $8,000". Well I don't have $8,000 so he basically told me "good luck" and left. That's when I started researching these leak stop shots. My long time AC guy said my R22 system was empty and I believed him because the AC was cooling one day, then the next day freezing up then the next day barely blowing cold, the next day the low pressure switch was shutting the compressor down. Ok so I did my research. I bought two of these Leak Saver injections and a 15 pound can of R22....which was incredibly expensive, but cheaper than a new system. So i hooked the can of R22 to the leak savers and shot them in followed by a nice charge of R22. It's been about 2 weeks and the AC has never worked better! Also my AC guy said my system was empty, it's a 4 ton and holds about 11 pounds of R22 and it took 7 pounds to fill so I have plenty of extra 22 and an extra leak saver for the future just in case. People, this Leak Saver WORKS! My 4 ton R22 split system was leaking out at a rate that would have left it empty in a week, it's been 2 weeks and it's blowing cold! Plus I am putting the gauges on every few days to monitor pressure, it is stable! I am amazed this Leak Saver worked. Blown away actually. I gave this stuff about a 5% chance of working on a 4 ton high side leak. Give this a shot before spending thousands. Your biggest expense will be buying R22 but it is available online.

Easy to add if your adding freon to the system. I use it when I can't find the leak. It has worked for me very well over the years. I prefer it over the injection models or the cans that sometimes don't seem to suck out the product. Takes 5 mins to use and is fairly cheap. Highly recommend.

The product made the promise! Highly ecommended.

Seems to work well in a mini split unit.

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

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.

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