A/C Pro? super seal is used to repair metal leaks and seal rubber leaks in car A/C systems. Included in this kit are a 3 oz can with 1.5 oz of R-134a and 1.5 oz of additives and a dispensing hose. Immediately after using Certified A/C Pro? super seal it is necessary to add additional R-134a to the vehicle?s A/C system.