AC Leak Freeze is the leading air conditioning and refrigerant leak repair solution in the US today. All products are OEM Approved. AC Leak Freeze is ideal for preventative maintenance and leak protection.Permanently seal gas leaks in A/CFor use in copper and aluminum coilsPolymer free: non-clogging to compressors, recovery units, Schrader valves, cap tubes, TXV valves, micro channels, evacuation equipmentPermanently seal gas leaks in A/C and refrigeration systems