Errecom Extreme Ultra | A/C Leak Stop for HVAC/R and Vehicle A/C Systems | Works with All Refrigerants, Lubricants and Systems Up to 6 Tons (21 kW) | no Adapters Included | 0.2 fl oz (6 mL) Cartridge

So far so good.Used in a 12k BTU unit. Was leaking its Freon over the course of a week. Since putting in the Errcom solution the unit has held steady for three weeks.Time will tell how long this lasts.

Instructions are vague. Hooked up and it blew the top off and lost half of it. Didn’t work but clearly didn’t get it all in either.

Item is actually easy to use. I was hesitant when I first got the item and messed up the first one and ordered a second one after I figured out what I did wrong.The product comes with two adapters for the two different types of coolant: R-134a (black) cap and R-1234yf (green) cap. It doesn't say, not that I've seen, which one goes on which. So I thought logically, well, to me anyway, low pressure on my R-134a is green, so it must be the green cap. I lost coolant, and product went everywhere. Then I laughed when it reminded me of the review I saw about losing all of the product through the top.Purchased another one, used the black cap, clicked it into place, attached product, injected, and let the vehicle run for 30 minutes. Only time will tell if it worked.Instructions should be included explaining a few things:* Do it when it has a fully charged AC system.* Start car.* Put on lowest AC setting.* Black cap is R-134a.* Green cap is R-1234yf.* Run car for 30 minutes.* Done.(update)This is the longest i have ever had ac in this car. So i guess that would mean it works

Works well. Had to buy two because the first one would not go in the system

Good stuff

Had a leak condecer coil. And been over a month so far so good. It was aluminum coil that's hard to weld. This sealer seems good!

This junk does not work.... I have used it several times and I have never had it work AND it held vacuum each time for 30 minutes (not just 5). I have yet to find a stop leak that actually works.

Tried injecting but the r-134a adapter was a cheap piece of you know what. It fell apart. I'm not sure if any of it got into the system, but it sure got on the floor. I did stop so I have half the cartridge left. An aerosol would have been easier as I have the hose/gauge for it. I already know that this is an evaporator issue, and of course that part is behind the dashboard, which will take at least 5 hours labor.Can you send the aerosol version or a new r-134a adaptor?