Leak Saver Direct Inject AC Leak Sealer — for Most HVAC Systems up to 5 Tons, Compatible with R22–R410A

Leak Saver Direct Inject AC Leak Sealer is a ready-to-use HVAC sealant that circulates in refrigerant lines to permanently seal small leaks in air conditioning and refrigeration systems.

This concentrated formula was designed to stop minor refrigerant leaks without disassembling equipment or replacing expensive components. It is compatible with nearly every common system and refrigerant except ammonia, and it installs easily through service ports using standard charging tools. The product is produced in the United States and has a long track record of professional and DIY use.

How quickly does Leak Saver stop refrigerant leaks?

The sealant is formulated to react at leak sites within days when the refrigerant charge remains substantially present. In many cases the active material will find and seal small pinholes and micro-leaks as it circulates with refrigerant and oil.

• Typical action seen within 7 days for small leaks
• Works continuously once introduced to the system
• Best results when used before a system loses most of its charge
• Can be used proactively as preventive maintenance

Will this product harm my HVAC components or tools?

Leak Saver is engineered to remain compatible with common HVAC materials and service equipment. It is safe to use with manifold gauges, hoses, expansion devices, Schrader valves, and other components when installed as directed.

• Safe for TXVs, TEVs, capillary tubes, and micro-channel coils
• Does not damage manifold gauges or service hoses
• Follow adapter recommendations for mini-splits and automotive systems

Which systems and refrigerants can I use it with?

The formula is broadly compatible and intended for residential, commercial, and automotive systems, covering most modern refrigerants. The only common exception is systems using ammonia refrigerant.

• Compatible with central AC, heat pumps, ductless mini-splits, and refrigerators
• Works with R410A, R22 and its replacements, R134a, R1234yf, R404A, R290, R600a, and more
• Not for use in ammonia-based systems

How do I install Leak Saver safely and correctly?

Installation is straightforward and requires only standard charging equipment or one of the brand’s injection kits. Automotive systems and some mini-splits may need a small adapter; review the included guidance or watch the manufacturer’s installation videos for visual step-by-step help.

• Inject directly through the low-side service port with a manifold gauge set
• Leak Shot Injection Kits make application quicker and cleaner
• Use a 134a-to-1/4" adapter for many automotive A/C systems
• Mini-splits may require a 5/16" to 1/4" charging adapter

Who this product is for: Leak Saver is aimed at HVAC professionals, contractors, and competent DIYers who need a reliable method to stop small refrigerant leaks without major repairs. It’s useful for preventive maintenance, on-site emergency fixes, and situations where a permanent repair is impractical or will be scheduled later. If your system uses ammonia refrigerant, seek an alternative; otherwise, this versatile, U.S.-made sealant is suitable for most residential, commercial, and automotive cooling equipment.