BlueDevil Products Red Angel A/C Stop Leak & Conditioner Kit - Rejuvenate Your Vehicle's Air Conditioning System

D. H. Bruce: As a skeptic of ALL stop leak products of any kind due to their potential to clog systems, I was somewhat cautious about using this product. I was experiencing a slow refrigerant leak in my AC in which the system would begin to blow warm air after about every 3-4 months following a refrigerant recharge. When I saw this Red Angel by BlueDevil stop leak indicated it is “non clogging” and also supposedly safe for refrigerant recovery machines, I thought I would give it a try. I installed the entire can in early June and it’s now October and the temperature of the output air from the dashboard vents is still around 42°F, as it was when originally installed. So far so good, but the real test will be next spring when I have to again begin to use the AC. I will update at that time.

As for the short hose on the can, I fortunately did not experience any issue with this because the low side service port on my vehicle is up top, just off from the accumulator, with no obstructions nearby. But I can definitely see how this can easily be an issue with servicing some vehicles. So overall (and so far), my experience with this Red Angel stop leak is definitely positive. Just keep in...

United States on Oct 02, 2023

Amazon Customer: This product worked great on my 02 yukon 4 years still holding . I think this is a great product .

United States on Sep 20, 2023

Larry A.: I will follow up if my small leak stops. The tube is only 2 inches long, so bleeding refrigerant and locking onto the schrader valve is difficult. The can plastic valve pulls off the can, because of the short tube. I wasted a lot of it just trying to get the attachment on the schrader valve. For the price, a little more quality would suffice.

United States on Sep 06, 2023

Johnny I: Did not work for me drove for an hour after putting it in I had holes in the condenser welds

Canada on Sep 05, 2023

Winter B: Shipping was super late, even Amazon felt it was late. Put the whole can in, drive for 15min. That’s it. Did not work. Wasted 90dollars. I will not recommend this product. Go get the 25 dollar Canadian tire leak pro. Those last longer

Canada on Aug 02, 2023

D. G. Anderson: I have a leak in the evaporater and the company said this would work. I had to use 2 cans. The 1st can was a mess. The top kept popping off and the sealer oil escaped somewhat so not sure how much really got in. I filled the system with refrigerant afterwards and it helped slightly but still had a leak. Bought another can and this time all of it got into the system. The top was still fragile but I knew to hold on to it better this time. The hose is really too short which causes issues. They really should make it longer. The 2nd time around seemed to close the leak better. I still need to put refrigerant in from time to time but not nearly as often or as much. Still much cheaper than spending $2K to replace the evaporater. I may try one more can later.

United States on Jun 26, 2023

Abdul A.: I used this product in my 2014 Subaru Outback and it worked. Before to use it, every time that I filled the system with a gas can, it took around 5 days to go empty the system. After I filled the system with this product, the AA blowed cold air during 5 weeks until I sold my car.

Canada on Jun 06, 2023

noblefable: I rarely write reviews, but this is worth writing about. For starters, I am not an auto mechanic. However, based on my education and job I know more about A/C than the average consumer. Keep a few things in mind… almost all of the vehicle A/C refrigerant piping and coils are out of sight. So seeing a leak while looking under the hood is not likely going to happen. Also, you don’t know if you have 1 leak or 25 leaks (or zero leaks because the real problem is something else) or how large each leak is, so using this product (which costs less than filling your tank with gas) requires taking a leap of faith. I used it on a 2013 model year car that I would not be willing to put major $ into for fixing the A/C. I have an A/C refrigerant gauge set, and I had zero pressure on low and high side. I added a good part of a 12 oz can of R134a and once enough was in the system the compressor engaged. If the compressor won’t engage when adding a decent amount of R134a, then there is no point using this leak fixer product because that is not the main problem, and leaks may not be a problem at all. My car A/C system only held the R134a for about 1 day, before back to zero pressure. That rate...

United States on Jul 16, 2022

DJ: If you're buying this, you're trying to save some money vs a proper repair. It may or may not work out for you. Buy it knowing it may not work, but if it does work it could save you $$. So make your own assessment.
I have read hundreds of comments, here's the summary that could save you some time:
5/4 stars - worked for me / may have worked for me
3 stars - seemed to work for a bit but lost A/C after X weeks
1-2 stars - Didn't work for me, and/or the connection and/or can leaked and I lost all the product.
Ok - my experience - shake the can. Remove thin tab from top of can. Turn on car (10 yr old odyssey with very small A/C leak) and A/C full blast. Connect can via collar connector to low pressure A/C port. Depress trigger on can. Observe substance flowing into the port. Lost some product (20-30%) from the connection at the low pressure port. TIP - keep your hand on this connection and you will lose less product. Gently - gently - wiggle the can as you depress trigger. Did this for about 2 min. The top part of the can popped off twice (didn't lose product, was able to pop the top back on and keep going). Drove the car for 15 minutes with A/C full blast. A/C worked...

Canada on Apr 30, 2022

William Allin: Cheaper sealers did not work to hold my freon. I was told to forget AC in my car. This product worked well. I ran it first alone for a few minutes. Then I added extra freon and the AC has been good ever since.

Canada on Sep 28, 2021