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

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

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 !!!

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 .

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.

Genuinely shocked this worked. Had a 2011 Avenger that had a leak from the evaporator core. At 300k miles - I’m not paying the $2,000 in labor for someone to remove the dash or doing it myself. Prior to this, all refrigerant would leak out in a day or less. With this - it has been over 2 weeks and it has not lost charge. Unlike other reviews, I had no problems with the can or connector. I also did not vacuum the system. I think it helped that I drove for 3 hours after putting in. Full disclaimer: This is only a Hail Mary approach. My car is old and my worst case scenario was spending $40 and the AC not working (Iike it already wasn’t). I would be leery of using this product on any new cars where you may consider eventually replacing components.

*MUST READ TO PREVENT CAN FROM LEAKING!!* I noticed a lot of people have the product leaking out of the can as soon as they hook it to their A/C system. Mine did that too because the pressure in the system is back feeding through the can. It should be in the directions, but you have to immediately press the button to engage the pressure inside of the can, which is more pressure than inside of your system, which prevents the back feeding and allows the product to go into the system. They don’t state this anywhere, but they should since it is happening to so many people. I just wanted to let everyone know because otherwise there’s a good chance it will fix your small leak with just about a 0% chance of clogging your system, unlike other brands. The short hose is also ridiculous. They should send a few different lentghs or at least one long one.

After watching ChrisFix on Youtube, I was inspired to try and fix my AC on a 2007 Accord. First, I had to determine if a leak was the cause of my AC woes. I purchased an AC gauge and used it determine what my pressures where. I found that my pressures were extremely low compared to the Honda maintenance guide so I added some UV dye and r134a so the compressor would circulate the dye. I purchased an inexpensive UV flashlight from Home Depot and didn't see a leak. After a couple of days of using the AC, I went back under the hood and noticed a leak on the high pressure tubing coming off the compressor. It was leaking from the crimp that transitions the aluminum tubing to the flexible rubber hose as indicated in the photo on the right. The leak continued to grow so I decided to add the Red Angel and slowly added r134a to the prescribed pressure level while checking the blower temperature. Over pressurizing the system can damage the system, so I wanted to be very careful. I found Red Angel after researching various forums and found great reviews. I didn't want a product that would harm other components that would be really expensive to replace so this seemed like the most conservative product to use. After following the simple directions, I noticed after a day that the leak was still growing. I cleaned off the dye from the crimp and used the AC for another couple of days. After a few days, I noticed the leak was still present but it seemed to slow down. After a week the leak completely stopped. The picture on the left is the residual dye and it hasn't grown since. The AC has been working great and I now am confident that the system is sealed. Great product that saves money. Note: This isn't a miracle cure. It will only work for relatively minor leaks. If the hose is torn or the aluminum tubing is cut beyond a pinhole, the leak will not stop. You will either have to replace the part or patch the damage. Also, be patient with the product. As I described and confirmed with technical support, the product will not seal immediately. It takes awhile for it seal.

I had 2 small leaks within my automotive A/C system, both in areas with no moving parts, best suited for this product to chemically seal as designed. The leaks were identified with a Halogen Detector, considered to be too small easily diagnose with UV Dye. Based on the detectors leakage sensitivity level a leak of 6 oz/yr. was detected in the evaporator (looks like the evaporator was leaking in the center out of multiple areas) and 3.5 oz/yr. in the condenser (right in the center of it). Both pieces would need to be replaced so I figured this product would work. After applying a vacuum to the system, I first started with the A/C stop leak, applied the product as directed, dispensing the entire contents first. I followed this by charging the A/C system with refrigerant to capacity. Over the next 2 weeks I used the vehicle regularly with the air conditioner. After I re-verified if the leaks were still present, I found that the leakage rate in the evaporator was within the same leakage rate zone (4-6 oz/yr.) , while the condenser, may have been showing false positives, likely was still leaking, albeit a very marginal rate < (1 oz/yr.). I considered this unsuccessful. When attempting to call upon the product's well stated guarantee claim with the manufacturer (Blue Devil Products), I was ultimately met with this email: Grant- You may have seen on our website under the Warranty/Returns tab: "Any online purchases made from unauthorized re-sellers are not warranted by BlueDevil Products." Unfortunately, we are unable to honor the warranty for your purchase as we can not access your order through our Amazon Seller account. You may contact Amazon direct at 1-888-280-3321 to obtain your refund. Be sure to have your Amazon order number available when you call. Sincerely, Apparently, Amazon LLC is not an authorized re-seller since BDP has their own storefront on Amazon. Additionally, I inquired which retailers were considered authorized retail outlets; after which I was immediately met with supreme sarcasm that all major automotive retailers: AutoZone, OriellyAuto, NAPA (basically the typical brick and mortar store) are all authorized, as well as WalMart. They also kept redirecting me to see their Warranty and Returns page like as if I did not get the Memo. Yeah, since that is my primary goal, to go and decipher a company's red tape and determine every condition in which their warranty does or does not apply. To me, it sounds like a bs scapegoat to wiggle out of that guarantee so proudly slapped on every piece of marketing material they own. The correct answer would have been, "we are sorry our product did not work, could you try giving Amazon a call first and if they are not able to refund you directly, give us a call back and we will make it right! Does that sound good to you?" So if you plan to purchase this snake oil, make sure you do it at a brick and mortar store, or directly from BDP. I was gravely mistaken to think this product would work anyway. To put it into perspective, if DuPont, one of the largest chemical companies in the world, creators and pioneers of most refrigeration chemical technology has not come up with a viable leak sealer with their massive R&D budget, then most likely, neither has anyone else. Note: Amazon was nice enough to cover the warranty (refund or replacement at your discretion) for this product, and will do so for 365 days from the date of purchase. The Amazon representative stated warranty claims are charged back to BDP.

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