Seals slow, pesky leaks in compressors, condensers, evaporators, accumulators, o-rings and hoses quickly and permanently. Non-polymer, oil-soluble formula is safe for AC system components and recovery equipment. Also ideal for preventive maintenance! Compatible with all popular refrigerants systems, including R-1234yf!*An alternative to expensive parts replacement on older, high-mileage vehiclesPerfect preventive maintenance aid remains safely in system to help guard against future leaksComes in full-color clamshell packagingAvailable in several convenient delivery methods*Not for use in hybrid vehicles with electrically driven compressor. Use TP-9831CS adapter for R-1234yf system.