I have a slow leak in my AC compressor, and without the financial means to "properly" fix it right away, I was looking for a temporary fix. A $14 can tap, a refrigerant hose + gauge that I already had, and a $20 6-pack of dusters. That should get me through an Arizona summer into next spring when I can get the parts, vacuum pump and gauge set I need to properly fix it.
Plus, as I understand it, it's better for the environment to leak R152a (difluoroethane) than R134a. If that kind of thing concerns you.
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