39241B-YF HFO-1234yf Total Leak Stop Plus U/V Dye. (NOT for USE in R134a Systems)

Funciona 100%

Great

Waste of my money. Arrived w a hole in the bottle and all fluid leaked out. Couldn't use it

Ive had my car’s air conditioning checked twice in 6 months because the gas leaks out slowly but they couldn’t find the leak. Instructions said to use this and then gas up the AC, but I had gassed up my AC first (2 weeks earlier) then ordered and used this; still worked great! 3 months later and my AC is still cool!

I tried using this on a 2017 BMW 540 that needed to have it's A/C recharged twice last summer. The quick connector that attaches to the low pressure port seems really cheaply made (it's plastic) and is difficult to attach. I thought that it was broken but eventually got it on... I think. One tip is to try to rotate the connector and try different positions on the low pressure port. Another tip is that your A/C compressure MUST BE RUNNING! I had to add just a little bit of refrigerant til my compressor kicked on, then I added the stop leak, then I added the rest of the refrigerant. Since there's only 1oz of product, it's difficult to determine how much product goes in or should still remain in the tube. The directions could use some clarification. However, I believe that some product did make it in, but only time will tell.

Use this on my wife's van. Has a very good UV die and easy to use. I cannot however tell you how easy it is to find the leak since this appears to have sealed it. Haven't had to recharge all summer. I was having to recharge it once a month last year.

This is good for a temporary fix but remember, any leak needs to be found and repaired properly

So far so good

We fitted a new ac pipe to the car and got it recharged by a garage and it only lasted three days. So we bought and used the ac leak stop, then refilled the system and it’s been working ever since. It’s so easy to use.

I also found that it did not fit my low pressure connector (1999 Land cruiser) Tried pushing straight on, nothing.. tried pulling back collar.. which just released coolant gas and still wouldn't fit on.. Will try again later - but oh dear!

seems to have stopped my leaking condenser.

Had my aircon regassed twice and had lost its gas within two weeks even though could not find the leak. After adding this product 6 weeks later the aircon is still blowing cold

Worked well and easy to do. Unfortunately my condenser had a larger leak than expected.