Leak Saver Direct Inject Ultimate 3-Pack | 3-in-1 AC Refrigerant Leak Sealer | with UV Dye & Moisture Remover | for Most HVAC Systems Up to 5 Tons - Professional AC Leak Sealer - AC Stop Leak

Seems to have helped with our residential split system. Was easy to use vs others and can't say if the UV worked as I never found any simye so maybe the leak sealent fixed anything that might have leaked.

So far, So Good. A/C had a small leak in the coil in the attic. Contractor charged $200.00+ to check the unit and confirmed a leak. They wanted $9,700.00 to replace the complete A/C system. I bought the stop leak and r410a… I put the stop leak and recharged it last week and the a/c is still working so far. Very easy to use and it worked.

I used this product on a 23 year old R22 system that had a very slow leak. I had to add some about every year but since R22 is so expensive now I didn't want to do that anymore. This product did seal my leak and the leak dye did show me 3 locations where I was leaking from which were so small a leak detector or bubbles wouldn't even show. I doubt this stuff would seal a major leak but the dye would at least show you where you are leaking from. System has been running now for about 2 months with no leaks

I think it worked on my $2000+ dollar refrigerator. After a week the freezer still holds temp at 8 degrees and fridge at 40 degrees F. It was a 134a refrigerant system. It seemed to be a very straightforward install system but there is a catch. I setup as recommended using the refrigerant to force the stop leak into the system. No matter what I did I couldn't get it to inject into the fridge. After trying at least ten times to get tech support on the phone I decided to investigate the issue myself. The tube has a Schrader valve on both ends??? (Schrader valve is like the valve on your car tires to let air in or out) I guess it is to hold the stuff in the tube. After looking further, I found there is a spring loaded movement in the fridge end of the application tube that is supposed to actuate a bypass for the Schrader valve. It didn't work on my piercing valve. So I removed the Schrader and carefully keeping the open end up so it wouldn't pour out, attached it to the piercing valve and "Voila" it worked instantly. I did have to recharge it after 2 days, but I felt that the initial charge I put in was weak in the first place. Seems to be working well now.Note: I did hear back in an email from tech support with good information that confirmed my assumptions about the Schrader valve. But my time is important to me, and if the directions just had a simple set of directions about what to do if it won't go into the piercing valve it would have saved me 4 hours of frustration and loss of time, for a task that should have taken no more than 15 minutes. Their website says nothing about this in the tech support page either and I believe it is likely a common issue.OVERALL: Good product; good price; poor instructions, poor website for tech support info.

UPDATE: this week the fridge stopped working again, loss of freon. So this product did not fix the very slow leak as I was hoping it would, so have to give it one star now.For the price, this is not a good value. The expensive brass fittings on each end are not reusable, and obviously jack the price up. The leak I’m trying to fix is in a fridge, and is very slow (2 to 3 months), and I’d expect this product would work, yet it doesn’t.And have not been able to find the actual leak using a black light to reveal the UV dye… frustrating!!Original, initial review:I just put this in today for my Samsung side by side. I did get the leakstop into the fridge today, I’ll come back in a few weeks to report on efficacy.1) package came with no instructions whatsoever… just the stop leak tube in a sealed package, in a branded slightly larger package… I went online for the instructions.2) Installing was challenging. There’s a valve at both ends, and neither activated. The input from the manifold has Schrader valve, but my hose/gauge does not have the fitting to activate it.3) The valve on the other end would not activate when screwed into a bullet piercing valve.I had to unscrew the first Schrader valve completely, connecting the gauge, the contents ended up in the hose, so the hose was the intermediate step…I ended up not using the supplied fancy brass fittings on a mini hose, though not intentionally, simply the valves were not working for me.4) at $46 I wonder how much was due to the nice knurled brass fittings? Is the compound available to refill the tube?Is there a recycling program?5) the fluid tube is very stiff… this became a problem as I had installed the bullet valve pointing straight up last week when I was doing the initial refill with r134a…. So there was not enough clearance between valve and chassis, making attaching challenging due to the stiffness…Wondering what I can do with these nice fittings, LOL…

Easy to use

This leak fixer allowed me to plug a small leak where I made a flare connection. I had lost all the refrigerant during the first try. Then I redid the flare connection, recharged the unit while using the leak stopper. It leaked a bit at first but then it stopped leaking. The HVAC appliance works now.Definitely recommend the product.

This appears to have saved my 3 zone diy project. I installed this preemptively just to protect from future leaks. One of my 1/4 connections (which I followed torque spec) has the tiniest green ring around it, so it must have had the slightest leak. This product appears to do its job! Why did you pick this product vs others?:Made in USA