Pro Seal  - Up to 4 lb System - AC Stop Leak  - For use in 134A and R12 Systems. Sealant formula developed by NASA for critical systems such as space flights, submarines, ect.
Sealant Can - Compatible will all oils (Mineral, POE, Pag, ect.). Will seal most small leaks in Air conditioning systems. Made by Envirosafe.  (95 to 99% success rate). Tap can, purge hose, add to running system, run system for 1 hour. If low side pressure is higher than 65 psi, you can heat the can with a heat gun/hair dryer/hot water and sealant will flow into the system at the higher pressure. If air or moisture is suspected in the system, you may want to add Pro Dry to the system. Found that Pro Dry greatly improves the performance in older systems with air/moisture in them. Pro Dry turns moisture into oil. Also available in our store.

• For R134A and R12A applications