A/C Pro Extreme Conditions R-134a Refrigerant Refill makes recharging air conditioners easy while protecting your vehicle in extreme conditions. This auto AC refrigerant protects against extreme temperatures and high use with a robust lubricant ingredient combo designed to withstand the high pressures that happen with frequent AC stops and starts. This A/C Pro refrigerant formula contains 2x cooling boosters versus the next leading brand of AC refrigerant to deliver the coldest air possible. Advanced AC leak sealer revitalizes rubber components like hoses, gaskets and O-rings and helps to protect and extend the life of your AC system. Take on car care yourself by recharging your vehicle's AC with A/C Pro. Nothing cools like A/C Pro.