Leak Saver Direct Inject UV - Refrigerant Leak Sealer with Added UV Dye to Detect Large Leaks - for AC, Refrigeration, and Automotive Systems Up to 5 Tons - Compatible with All Refrigerants - 3 Packs

There's not much more I can say about a product that truly works. I replaced my outdoor compressor with R407C, a direct replacement for old R22 system. The coil was in the attic and almost impossible to reach comfortably. It is 25 + years old. This year, I was losing pressure, so I gave this a try. BOOM ! leak stopped immediately. I added more gas and at 90 degrees out, I'm pushing 68 indoors. Contrary to HVAC guys, this product works and at $37 a squirt, any other conversation is used car talk ! And so simple to do, I bought 2 more for other systems I have. TRY THIS FIRST, SAVE THE BS

First off, I very seldom do reviews of a product, but this inexpensive product saved me a lot of $. I got tired of getting ripped off by the local AC companies in my area, so I watched several YouTube videos on HVAC repair and decided to give this shot. I had a small leak in my 12 year old system and the HVAC guy told me that I needed a new 5 ton unit due to its age. Long story short, I tried this product and it fixed my leak. It is well worth the cost. Great product!

I bought this exactly one year ago. I put it in myself. It's quite simple to do using the CO2 powered gun I bought separately. 2 years prior to getting this every time I turned on the AC for the summer I had to add about 3 pounds of 410. This year I turned it on and low and behold I had cold air! I'm not saying its perfect and wont need ANY 410 this year but it's working so far! I know some "Pros" say not to use this kind of thing but I learned of this stuff from the other Pro sites on YT that recommended it. It's well worth a few $$ to try it.

I recently purchased the leak saver sealer with UV dye along with the leak shot CO2 injector. It couldn't have been easier to use. This is the way to go if your a DIY type like me. It's a little early to tell whether or not the product will work but I'm confident but at least with the UV dye added, the leak will reveal iself and hopefully seal it as well. The leak I have is very small but I don't know where it is. It only loses a couple maybe two to three pounds so once I have I have it recharged spend time will tell it's effectiveness but I'm really hoping this works as it will save me a ton of money getting a new unit and keeping this old one running for a bit longer.

As an HVAC novice but a buildings expert I can Highly recommend this product for its ease of installation and effectiveness. It worked as advertised sealing a small leak in my lineset. Was quoted $8k from a reputable repair company I was able to fix the leak and recharge myself. Ill note the device has a low loss fitting attached making it not only effective but safe to use for even a novice like me. You dont want to get frostbite from the refrigerant. Also the included diagram makes it fool proof.

Did NOT work at all. After application system was loosing pressure very slowly. 2 weeks later technician found misroscopic pin hole on outside condenser, brazzed hole and since then system is working fine. So, product DID NOT DO what was promised/advertized. DO NOT BUY! You will just throw your money away like I did.

I’m not sure if it is us or the product. But this didn’t seem to work the way we expected. We were initially optimistic but within a few hours, we were back to where we started. My husband is an accomplished household repairman so we don’t think it was him. Not sure if we had unrealistic expectations? Would not buy again.

I'd been trying to locate a small Freon leak with soap sprays, oil residue searches, & Freon sniffers on the 7-year old split unit heat pump in my shop. It would run for 4 to 5 months of cooling & heating, then suddenly shut down with low pressure indicated. It tended to run longer cooling than when heating. I was leary of stop-leak products in general because of bad experiences in car systems; the stuff plugged up everything (like thermostats) as well as the intended target. The R-410A systems run at very high pressures compared to old R-22 systems so I expected to find a fitting not quite tight enough to hold the refrigerant. No luck. I viewed the clear tubing holding the stop leak & UV dye with suspicion--didn't look strong enough to hold the high pressure. The connectors fit perfectly (I already had the adapter on the low-pressure line needed to connect the low-pressure hose); they were just like an extension of the charging hose. I decided to do the injection & recharge in one go. I set up liquid injection into the low-pressure line to make sure the contents were diluted promptly. When I opened the tank charging valve the yellow fluid in the clear tubing vanished immediately followed by boiling R-410A. I watched while the scales moved smoothly up to the 68.8 oz charging spec with the system running on cooling. Everything worked fine for about an hour then the system shut down. Turned out there was more residual R-410A than I expected & the system stopped (high pressure cutoff) when the fluid temperature came up to the 100 deg F outside temperature. I decided to let the system pressure equalize--give the leak a chance to expel some of the stop leak fluid. Air & moisture was suppose to cause it to harden & plug the leak. Sure enough, the next day the AC came on & the air coming out of the evaporator was a chilly 50 deg F. It has worked great both as a heat pump & AC since then. I haven't tried to located my UV light to see if any dye escaped. I expect that will be easier to find if significant R-410A escapes in a few months. Follow the instructions; I recommend this for small leaks--don't waste R-410A (or any other refrigerants) trying to plug large leaks. The dye-only version is probably your best approach in that case.

Had a leak last year. Used this after refilling to try to last for another summer and so far it held up a year later! I have stopped using the heating cycle to prevent useless thermal stress and extend it as far as possible. I tried to cheap out buying this and a manual pump and adapters and whatnot. TLDR: Don't cheap out and get the Co2 injector too.

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Don't buy this product! They all came broken and of course you can't return these.

it didn't worked, I used this product in my Skoda Superb, 1.8 TSI car AC , in which the AC gas leaks in 22 to 24 days , but after using this product nothing changed. now also the gas leaked in 22 days

It does not work