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

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

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.

This is the second batch of Refrigerant Leak Sealers that I've used. I was losing a lot of freon from 2 systems. The initial treatments stopped the leaks almost completely. After a couple of years, one system started to leak a little. Another treatment stopped that as well. Now it's several years later and another treatment has boths systems working great and leak-free. The HVAC company charges $100-$150 per treatment for a very similar product. My builder-grade AC systems are almost 20 years old. Ours is the only home in our development that hasn't had to replace the AC systems. You do need a a basic manifold gauge set or injection kit, but it's simple to use.

Why did you pick this product vs others?: It had good reviews, so I figured it was worth a try. It's not hard to get it into the A/C system. Best way is to valve off the high side output of the compressor, wait until the suction side pressure is down to like 5 or 10 psi, then attach the tube of stuff and push it in with the tank of gas. It only takes a few seconds. Once in, close the valve on the gauges, open the high side valve back up, allow the system to stabilize, then finish charging. I can't say whether it worked or not, that will take a couple of months to see if the system is still losing refrigerant.

Don't buy this one nothing inside there. And can't return it Just watest money

Old r22 2.5 ton package unit had a leak...most likely in the coil. didnt have the $$$$ to replace unit. 2 tubes of this got us through arizona summer. Never actually found the leak but this seems to have plugged it. I was loosing our entire freon charge in about 28 days. Put the first tube in but had some user error and some spilled out. Recharged and lost freon in around 33 days Took the risk of buying a second tube thinking user error and the second tube (injected using their co2 injector) seems to have fixed the problem. In 115+ degree phoenix AZ heat this quite literally saved out life's. Will it hold next year? I dont know but I will update At the very minimum I think if you have a leak this product is definitely worth a try. For only $$ vs $$$$ or even $$$$$ to replace a unit its a very little to lose situation. Highly recommend

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.

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.

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