Leak Saver Direct Inject AC Leak Sealer 6-Pack — HVAC/Auto Refrigerant Leak Repair, Works with R410A & R134a

This six-pack of Leak Saver is formulated to stop small refrigerant leaks within most residential, commercial, and automotive cooling systems. Designed for direct injection into a pressurized system, the formula moves with the refrigerant and reacts at leak sites to form a durable seal. It is made in the USA and engineered to be compatible with a wide range of refrigerants and system components, offering technicians and DIYers a fast, less-invasive option for leak control and preventive maintenance.

How quickly does Leak Saver stop a small refrigerant leak?

In systems where the refrigerant charge remains mostly intact, Leak Saver typically completes a seal within seven days of circulation. Results depend on leak size, system pressure, and airflow across the evaporator or condenser, but most small leaks will show closure in the first week.

• Typical time to seal: up to 7 days under normal operation.
• Works while system runs—no long downtime required.
• Most effective on small pinhole or hairline leaks.

Will this product work with my HVAC or vehicle air conditioning system?

Leak Saver is compatible with nearly all modern HVAC and refrigeration equipment, as well as most automotive AC systems, excluding ammonia-based systems. It is formulated to be safe with common oils, metering devices, and valve types used across cooling equipment.

• Compatible refrigerants include R410A, R22 (and replacements), R134a, R1234yf, R404A, R290, R600a, and more.
• Safe for expansion devices like TXVs, capillary tubes, and TEVs.
• Not for ammonia refrigeration systems.

How do I install Leak Saver—do I need special tools?

Installation is straightforward: the product injects directly into a charged system using a standard manifold gauge set or Leak Saver’s Leak Shot Injection Kits. Automotive systems and some mini-splits require simple charging-adapter fittings to connect to service ports.

• Use a manifold gauge set or Leak Shot kit for direct injection.
• Automotive AC often needs an R134a-to-1/4" charging adapter.
• Mini-splits may need a 5/16"-to-1/4" adapter for proper connection.

Is the sealant safe for my tools and system components?

Leak Saver is formulated to be non-corrosive and compatible with service tools, hoses, gauges, Schrader valves, and the internal parts of HVAC and refrigeration systems. It is designed to circulate without damaging metering devices or seals when used as directed.

• Safe for manifold gauges, hoses, and Schrader valves.
• No adverse effects on TXVs, capillary tubes, or other metering devices.
• Designed for routine preventive use as well as corrective repairs.

Who is this for: Leak Saver Direct Inject AC Leak Sealer is aimed at HVAC technicians, maintenance pros, refrigeration service teams, and confident DIYers who need a practical way to stop small refrigerant leaks without major disassembly. It’s ideal when you want a fast, field-friendly solution that’s compatible with most refrigerants and system designs, or as a preventative additive to reduce future leak risk. For larger leaks, systems with lost charges, or ammonia applications, use conventional repair methods and consult a technician.