Leak Saver Direct Inject Small System with UV Dye - Refrigerant Leak Sealer - Detects Large Leaks - Ideal for Most Small Home Appliances and HVAC Systems up to 1 Ton - Proudly Made in The USA

Easy to use for DIY. Wasn't sure whether I had a leak, but decided to use it in case there was, and if not it is in the system in case a leak were to develop, so it can potentially self heal. Good instructions, just needed a piercing valve and to borrow a vacuum pump and manifold gauge set from my son.

Money is wasted. I own an appliance repair business and tried this several times. They say this product can seal any leak that takes more than seven days to leak all refrigerant. But every time I used this the system lost the refrigerant within two months. Do not recommend.

Great

One of my A/C has a very slow leak: It takes months (3 at least) for the pressure to become noticeably low and, even then, it's just below normal operating range, never "empty". I had already tried to find the leak; I have reattached all the couplings 3 times already. I don't think the problem is there. Due to the extremely slow loss, it seemed a perfect candidate for this solution (as it's indicated for leaks of "more than 7 days to empty"), but unfortunately, it didn't work: The time it usually takes for the unit to show signs of low pressure went by, and it did; it started to show symptoms as if I hadn't used any sealer. I haven't been able to find a UV trace either. Why 5 stars then? This company is truly behind its product, and they made it right for me; so much so that I am giving the product a second chance (this time, if it doesn't work, I won't hold it against them: They already took responsibility for the first instance.) The moral of the story is: I recommend this product even if it didn't work for me. It seems it does work for other people, and the company is true to its word.

I tried this on two mini splits that had slow leaks before I found Nylog. The first seems okay. The second one must have had bad product. It was a 2 year old system that was a little low. I shot in this leak saver and it was very slow going in and made a farting sound. Much different than the first one I used. The gas was very slow going in. Unit ran for about a half hour and the compressor started making a loud banging sound every few minutes. The sound kept getting worse. By the next morning it was making a grinding sound and was working poorly. I know when you disconnect service hoses you will get some splash as found on the first unit with UV. The second unit that had the problem showed small bits of solid yellow under UV. Not splash. I disassembled the system and shined UV in the lines. I got NO UV indication in the lines. That means the Dye/ leak saver must have been solid upon install. If it was liquid it should have been distributed through the whole system after a few hours running. The unit is trashed and I had to buy a replacement so now I am out the 30 bucks spent on this product, 600 for a new unit and some expensive R410A. Plus labor and parts to fix the wall. I figure good luck getting anything back from leak saver and am not going to waste my time. STAY AWAY FROM THIS PRODUCT!!!!!