A/C Pro Super Seal All-In-One Stop Leak makes it easy to seal up leaks in your air conditioning system. This AC leak sealer repairs metal leaks in evaporators, condensers, compressors, accumulators and receiver dryers, and it seals rubber leaks in O-rings, gaskets and hoses. There's no need to chase with refrigerant after adding it to the system. It also helps eliminate harmful moisture, and won't clog up your AC system or service port when used as directed. Red dye in this AC kit helps to detect leaks that are too large to repair. Take on car care yourself by recharging your vehicle's AC with A/C Pro. Nothing cools like A/C Pro.