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

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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Excellent Product – Easy to Use and Effective. I’m an HVAC technician and this product worked exactly as expected. Easy to inject, no issues during installation, and it helped seal a small refrigerant leak quickly. It saved time and avoided a costly repair for the customer. I would definitely buy it again and recommend it to other HVAC professionals.

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

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.