InterDynamics Certified A/C Pro Super Seal Car Air Conditioner Refrigerant Stop Leak Kit, Repairs Metal Leaks and Seals Rubber Leaks in O Rings and Hoses, Includes Reusable Dispensing Hose, 3 Oz, InterDynamics

My old car's ('03 Subaru ) AC developed a leak where it would stop working within a couple days of a refill. I tried some other similar stop-leak products but only meant for worn seals etc that had the refrigerant included without success. The estimate for repairs was $900 which is more than I was willing to fix a car I intend on replacing soon.**The text on the packaging does explicitly state that the product is not appropriate for a leak was fast as mine**I decided to give this stuff a try and immediately refilled the AC unit after as instructed, much to my dismay (and no surprise) the AC stopped working again within days and I gave up. I decided that I would add $4.50 refrigerant before the next few road trips and start shopping for a new car before I create a new hole in the ozone layer.A week later I needed the car and it was very hot out so I refilled the AC again expecting it to stop working within a couple days again and here I am over 5 weeks later and the AC still works! I've delayed buying a new car because of this.EDIT: 1.5years later and still holding up! It might not work for you but it’s certainly worth trying.Edit June 2019: 2 years later and AC still works! A little less cool this summer but will add some refrigerant soon

Didn't work, poor value for the price.

My son and I are restoring a black and red 89 Iroc z. Cool-looking, but murder in the summer sun. The seller swore that the AC worked, but it had a leak, and he wasn't kidding. Fully charged, the AC worked great. But after bringing the charge up to mid-level with three 12-oz cans of replacement R134a, the system was down to near zero in one or two days. And it's 90+ here in Maryland with 70-95% humidity. And we're saving our pennies for good headers, not AC (yet). And in this weather with crazy humidity and sudden thunderstorms, opening the T-tops doesn't cut it. What to do, what to do...............So after reading the reviews, we tried this ID brand sealant. I wasn't hopeful, because our leak was major. But we hoped to limp by until cooler fall weather, and then do major repairs next spring.Three weeks later, the AC is still blasting out cold air and the charge level appears to be spot-on. I added this leak stop and then another three 12-oz cans of R-134a. IMPORTANT: If you have a can tap with a slash tip that punctures the top of an R134a can, it won't work with most leak-stop cans. So buy this one because it has the correct can tap, which uses a pin to push down a valve in the can.Eventually I'll have to buy a compressor kit with the dryer and piping, and also a vacuum pump. But for now, this stuff seems to have saved our keysters, allowing us to focus on more engine mods.

I put it in a window a/c unit. It blew a bunch of foam looking stuff out of the hole and then dried up a sealed in the hole. Hasn't hurt the compressor and it's still sealed. Has been a couple of weeks so far

Funcionó perfecto sello la fuga ya llevo 18 meses

Classic case of the warranty expires and 2000 miles later something expensive breaks. I tried it on a slow leak (2-3 weeks between charges) my regular mechanics couldn't fix for less than $2k - evaporator coil leak inside the dash. They actually recommended I have the dealer do the job! I followed all the directions to the letter, but his product didn't work for me, and may have clogged the condenser. After so many evac-refills I don't doubt there may have been some contamination in there already. However the dealer fixed that too for less than the original quote, after three weeks of, "Let's try this next, it might be a sensor here." In other words I got lucky this time, but would try it again versus a multi-thousand dollar repair!

I was holding off from writing this review; I didn't want to jinx the success. Three week after using it and still going strong. Another reason for not writing a review you see, rating up products on Amazon tend to send up the price; but customers should also benefit from its use. This product works. The product information strongly suggest using it on leaks that last at least two weeks; my AC system leaked in three days. I was desperate; I identified leaks on the evaporator and dryer. I was also told the compressor shaft seal had a leak. Compressors are very expensive not to mention the installation cost, and to vacuum, gas and oil $$$$$$$$. I fixed the leak on the evaporator and dryer (small money), but the system still leaked from the compressor shaft seal. What makes this product exceptional is its use on metal, unlike other AC seals. After identifying the sole leak was from the compressor seal, I then used the super seal. It helps to know exactly where the leak is for larger leaks to achieve success.

I had trouble making a firm connection to the Low Side terminal with the hose provided onto my 2000 Chevy Silverado. After I confirmed the connection I followed the directions provided. I emptied the AC Pro Super Seal can into the line and also added about 15 oz of R134a Freon. I ran the AC at Max for more than 30 minutes. I had cold air and everything. But the next day all cool air was gone when I drove my Silverado. It appeared the leak was not fixed. All Freon was gone.