Interdynamics A/C Pro ACP-105 Refrigerant With Max-Seal (12 ounces) Restores lost refrigerant and oil in automotive A/C systems Contains MAX-SEAL 2-in-1 Chemistry Sealing agents help stop leaks and re-condition rubber O-rings, gaskets and hoses Anti-corrosion additives help reduce moisture and acid buildup to shield against metal leaks Three easy steps