Leak Saver Direct Inject AC Leak Sealer Small System | AC Stop Leak for Most HVAC Systems Up to 1 Ton | Works with All Systems & AC Refrigerants | Made in the USA

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!

Great find; had a small leak in a DIY mini-split system. Goodbye leak.

I used it on a GE refrigerator works great

I have a small and slow coolant leak in our wine frig. The system is small (1.8 oz of 134a) and I hoped that this would solve the problem. I recharged the system and used the product, but the leak persisted and the frig lost temperature again over the same period of time (about 3 days). I bought and tried a second application and still no success. After investing about $100 for the injector and the two treatments, I really hoped this would be a cost-effective fix. Time to research some other products in hope to avoid replacing the frig.

I have a pretty bad leak in my mini split system. I had to add freon once every 30 days or so. Was about to buy a new system but decided to try this. Leak saver stop-leak did slow the leak down but did not stop it. I had to add more freon 8 months later. I'm not upset about the product not working because I know it is major leak. I'll be looking for a new unit soon.

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.

Its an awesome product works amazing

I refurbish small sealed-system refrigeration appliances; e.g., mini-fridges, wine and beverage coolers, kegerators, ice machines. These small refrigeration appliances are rather notorious for failing to cool after just a few years of use; and I typically collect such from folks grateful to be rid of a bulky and seemingly useless cube. I then attempt to repair the things. Small sealed-system refrigeration appliances are not terribly complicated devices. In most cases I discover a small leak (usually in a soldered joint) and I apply the appropriate repair. After a few weeks of evaluation, I then sell the thing for a nice profit. Instances where I determine a leak is inaccessible or otherwise indeterminate, I inject a shot (or two) of Leak Saver Small System Refrigerant Leak Sealer followed by the usual refrigerant recharge procedure; I then evaluate the operation of the appliance for a month or so. I don't have success with the Leak Saver product 'every' time; but I’ve had enough success using the product in my very specific application that I am content with the brand, and satisfied with its efficacy to do what it claims.

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

Le produit fonctionne très bien presque toujours…

Worked great on my 2005 Malibu ...the Mazda 5 ..not so much ... lol in / out on the ground ....

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

Fixed leak