Quote from Wayne Gibbous:
I've had good luck with the "lube/recharge/seal" type stuff you can put in with a simple gauge set. Got mine at Walmart.
I 100% agree, I have used the 2 part leak sealer kit from WMT in 10 vehicles that had leaks. All but 1 of them quit leaking. The one that still leaked had 298k on the original comp and it went from not holding a charge to only needing a can every 3 months.