Our Direct Inject refrigerant leak sealants are perfect for Automotive and car refrigerant leaks. Other stop leaks simply recondition the o-rings. The Leak Saver is a true refrigerant leak sealant that reacts with the air, moisture, and atmospheric pressure at the leak site to create a permanent seal. With a manifold gauge set and a refrigerant tank or can, the Leak Saver installs quickly and easier. For an even easier installation, use our Leak Shot Automotive or Leak Shot Pro injection kits.