Envirosafe Proseal XL4 for R22, refrigerant sealant, Auto A/C, 1 Can

For larger units over 5 tons, we suggest you use the Enviro-Safe Proseal XL4 Direct Inject. These are available in various of the larger sizes. If the a/c system that will not hold a vacuum, you need to use the Enviro-Safe Prodry XL4.