Rectorseal 45308 AC Leak Freeze .5 oz. Minisplit With UVRectorseal 45308 Revitalizes Mini split A C systems by permanently sealing small, hard to find micro gas leaks Features Permanently seal gas leaks in A C For use in copper and aluminum coils Polymer free: non clogging to compressors, recovery units, schrader valves, cap tubes, TXV valves, micro channels, evacuation equipment single use UV formula adds the ability for a UV light source to detect larger leaks Additional Information Case Weight (lbs) 5.