Red Angel Automotive A/C Refrigerant Stop Leak with Attached Cupler| Permanent Non-Clogging Leak Repair | 4.5 oz.

My 2012 vehicle developed a leak in the A/c evaporator, which would cost over $2500 to fix, since it requires removal of the dashboard. Previously, I tried a stop leak product available at the local discount store, but the Freon leaked out overnight. I decided to trade in the car because I can’t live another summer without a/c, but figured I’d give red angel a try before throwing in the towel. To my shock, the Freon did not leak out the next day and still blew amazingly cold air. I’m going on almost 2 weeks now and all is well. Also, many reviews criticized the dispenser and application, however, for me, it worked fine and I was able to see all of the the red product flow into my low pressure port. I highly recommend giving this product a shot when others fail before throwing in the towel on an expensive repair or trade in. Just carefully read and follow the instructions, cross your fingers, and see if it works like it did for me. I don’t know how long this will last but it was certainly worth the cost. Update 3/29/2026 - well after all these months my Freon finally leaked out. I consider this an excellent result, since it gave me so many months of a/c use. I recharged the car with a can of cheap Freon from a big box store and all is blowing cold again. . Depending on how long this holds, I may just buy another can of red angel to see if it gives me another long run of a/c use .

I purchased this stop leak & put it on my shelf as I was waiting for 134r Freon to arrive. I went to use it & the quick connect hose broke off as I was putting the quick connection on the air conditioning system, the red stop leak went everywhere & made a huge mess, now the hose won't stay on the can no matter what ! It's plastic & it's junk, it is now unusable & the return time expired & I lost out on the money I spent which sucks. Do not buy this product, oh yeah it took forever to arrive as well. I live in the desert & I really needed to have my air working. Don't buy this product, it turned into a huge pain in the a--. I didn't want to give it a single star but I had to, to post it. Signed, a very unhappy & hot customer !!!

Well, I put the Red Angel into my 2002 Oldsmobile Aurora 4.0 v8 that had leak that fully drained in 24 hours, I tried every stop leak on the market but it would always leak out by the next day,So I saw this advertised on an auto parts website but it was almost $50 so I tried looking for it on here at Amazon, I got the stuff on July 1, 2014 I read the directions on the can and it was basically start your car, turn the A/C on high and shoot the stuff in and fill it up with 134A coolant..it took all of 10 minutes..the only drawback was the can, the top was off the can when it arrived and I just put it back on and very little escaped from the top, now here it is July 4, 2014 and it is still blowing ice cold air, now it is too soon to tell, but I went over the 24 hour mark, here it is 96 hours later and it still works 100%.... I will keep you updated as the summer goes on, but I have a good feeling with the Red Angel UPDATE!!!!!!!! Sep 27th 2014 Well it is blowing warm air again. Here in PA it was kind of cold for the last 2 weeks so I did not use the AC but the other day it was hot, so I turned on the AC but no go, it was back to blowing warm air again, but honestly I am not disappointed at all because Last year I would fill it up with the R134A and by the next morning it was gone, so I used the red angel on July 1st and Sep 25th it was warm again(ok it was hot air lol) but I figure this....I spend $20/day to have AC(Nope) or I spend $30 for the Red Angel plus say $20 for 3 cans of R134A and it will get me through next summer? yes the Red Angel did not stop the leak, but it slowed it down so I could at least drive the summer with AC So to recap : The Red Angel sort of worked It got me through a summer using AC I spent $30 for the Red Angel and $24 for r134a (3 cans)(2 cans with the red angel 1 can to top it off on 8/17) so $54 to get me through the summer or a lot more than that NOT using Red Angel now it was Ice cold from 7/1/14 until 8/17/14 when it was blowing cold but not as cold as it was, I used 3/4th of 1 can of r134a and it was back to blowing Ice cold and lasted until 9/25/14...all in all I am pleased with the product.. I got over 2 1/2 months with the Red Angel VS 1 day with the other stop leak products on the market. Next Summer I am going to buy the Red Angel and 3 cans of R134a so I can hopefully get through another summer.... I hope this review helps someone decide whether or not to try this product because even though it stopped working it was cheaper to try this rather than fix my system for $800 on a 13 year old car with 160k miles on it... I will most definitely buy this product again

Read all directions before use! Make sure you shake can as directions say. Simply place on the A/C Low side Start your auto up with the A/C on "Max-Recirculate" Blower on highest setting. Then simply push button/tab to use. After installing the "Red Angel A/C Stop Leak" leave the car/truck running for another 20 to 30 minutes. Or just go for a drive. Reason is to make sure all sealant & Freon & oil is circulating properly. If your A/c is still not as cold for you. This can has about 2 ounces of Freon in it. So make sure that your system is not under or over charged. Either way is bad for your A/C. If you buy Red Angel's other version of "A/C Stop Leak" it has 4 ounces of oil. If you do not remove some oil in your A/C system this can hurt it & harm your compressor or other parts in system, The Red Angel with the Freon work very easy & your system is already being charged for you. Now for what I used it for & why. Sealed my A/C leak up instantly. I have a 1999 Jeep Grand Cherokee which are "NOTORIOUS" for bad evaporators & leaking. If you were to fix the evaporator it's an 8 hour job. plus you would need to replace the receiver/dryer & orifice tube. A bill would be at $800 with parts & labor & an A/C system recharge. Save your money & invest $30 for "Blue Devil Stop Leak". Also make sure that you write on your hood or radiator plate that your have a stop leak in your A/C. If not, you can be held responsible for the garages A/C machine! This cost at least $3000. Any foreign material can harm it. Blue Devil says that this is machine safe. But to make sure just tell your mechanic! It will be the safest for you not buying a $3000 to $7000 shop item.

Works great

This is probably the best AC stop leak on the market, but the instructions are not sufficient. The first can I used didn't stop the leak, and the second also didn't, but the compound was still in the system, so realizing it is not having enough contact time with leaking area, I just filled the system again with refrigerant and let the car idle for 2-3 hours with the AC at max, and this time it did its job. It needed more time in contact with the leaking area, and having the AC on for several hours meant the compressor kept it circulating long enough to do it is job.

After 3 years of air con not working after being recharged twice, I thought that's it. Saw this product and decided to give it a go. After 4 weeks now and my ac is still working. Dunno how it's fixed it but so far so good. Bit expensive for such a little can but compared to having an ac specialist do the repair it's a bargain.

had a leak in the hose pipe which used to last for 2 months. used this product but it did not fix it. finally has the pipe replaced to fix the issue.

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