Most AC stop leak sealers work well to stop small pinhole leaks in the AC pipes, but it's not recommended by us. ... In my opinion, it is much better, and also probably cheaper in the long run, to repair a leak properly. Pros. They can repair minor AC leaks, like pinhole leaks.Sep 9, 2021
How long does AC Stop Leak take to work?
The product takes less than 15 minutes to circulate through the system, sealing any leaks. It's compatibility with a variety of refrigerants also separates itself from its predecessors. This new type of stop leak is compatible with R-134a, R-12 and R-22, as well as newer environmentally safe refrigerants.