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BlueDevil Products

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

  • Based on 1,394 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Jun 29
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Size: 4.5 Ounce (Pack of 1)


Features

  • Guaranteed Permanent Seal
  • Will Not Clog or Damage the A/C System or Recovery Unit
  • GUARANTEED PERMANENT SEAL
  • Now with UV Dye for leak detection

Description

Red Angel A/C Refrigerant Stop Leak provides a permanent solution for automotive A/C leaks and is designed for quick and efficient application with its "One Shot" system. Safe for use in critical components such as condensers, evaporators, hoses, gaskets, and O-rings, it contains no solids or particles, ensuring it won’t clog or harm your car A/C system. Specifically designed for R-134a systems, it includes a refrigerant charge to restore optimal A/C refrigerant performance quickly. The attached coupler allows for easy, DIY installation, and the built-in UV dye simplifies future A/C leak detection. Red Angel A/C Refrigerant Stop Leak offers a reliable, long-lasting repair solution, backed by a money-back guarantee.

Material: Plastic


Brand: BlueDevil Products


Item dimensions L x W x H: 2.25 x 2.25 x 5.5 inches


Inlet Connection Type: Compression


Number of Ports: 1


Specification Met: SAE J739, ISO 8422, ISO 817, SAE J2843


Global Trade Identification Number: 25


Unit Count: 4.5 Ounce


Manufacturer: BlueDevil Products


Number of Items: 1


Inlet Connection Type: Compression


Number of Ports: 1


Valve Type: Check Valve


Item Dimensions: 2.25 x 2.25 x 5.5 inches


Size: 4.5 Ounce (Pack of 1)


Item Weight: 4.48 ounces


Material Type: Plastic


Specification Met: SAE J739, ISO 8422, ISO 817, SAE J2843


Brand Name: BlueDevil Products


Model Number: 00222


Global Trade Identification Number: 25


Manufacturer: BlueDevil Products


Manufacturer Warranty Description: limited


UPC: 891838002225


Manufacturer Part Number: 00222


Item Type Name: A/C Stop Leak


Unit Count: 4.5 Ounce


Included Components: 4.5 Ounce aerosol can


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Jun 29

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

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Top Amazon Reviews

    • It works!!!....... UPDATE!!!!!!!!!!
Size: 4.5 Ounce (Pack of 1)
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 ... show more
Reviewed in the United States on July 4, 2014 by Chris Wagner
    • Do not purchase this cheap junk !
Size: 4.5 Ounce (Pack of 1)
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 !!! ... show more
Reviewed in the United States on July 18, 2025 by Dennis L.
    • Worked when other product didn’t
Size: 4.5 Ounce (Pack of 1)
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 . ... show more
Reviewed in the United States on October 7, 2025 by AJ
    • Buy this for a quick & inexpensive A/C fix!
Size: 4.5 Ounce (Pack of 1)
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. ... show more
Reviewed in the United States on July 8, 2014 by PER

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