Leak Saver Direct Inject AC Leak Sealer 3-Pack — Seals Small Refrigerant Leaks in HVAC & Automotive

Leak Saver Direct Inject AC Leak Sealer is a ready-to-use formula that permanently seals small refrigerant leaks in most HVAC and automotive systems when the system retains the bulk of its charge.

Designed for HVAC technicians, maintenance pros, and informed DIYers, this three-pack injects directly into the refrigerant line to react at leak sites and form a durable seal. Compatible with virtually all modern refrigerants and refrigeration equipment (except ammonia systems), Leak Saver travels safely through compressors, coils, and service valves and is made in the USA. This product is intended for pinhole and small-orifice leaks where the refrigerant charge remains largely intact over the first week after treatment.

How quickly does Leak Saver stop a visible refrigerant leak?

Most small leaks begin to seal within days after the product circulates to the leak site; full sealing is often observed within seven days if the system retains most of its refrigerant charge. Performance depends on leak size, system pressure, and how consistently the system runs during that week.

• Typical sealing window: up to 7 days for small leaks
• Works while system operates — circulation carries sealant to leaks
• Not intended for large ruptures or completely evacuated systems
• Monitor pressures and repair or replace major damaged components

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

Yes — Leak Saver is formulated to be compatible with most residential, commercial, and automotive systems (excluding ammonia refrigeration). It functions with all common refrigerants including R410A, R22, R134a, R1234yf, R404A and hydrocarbons like R290 and R600a when used according to instructions.

• Compatible with central AC, heat pumps, ductless mini-splits, and refrigerators
• Works with automotive A/C when using standard 134A to 1/4" adapter
• Adapters may be needed: mini-split 5/16" to 1/4" adapter
• Not compatible with ammonia-based systems

How do I install Leak Saver — is special equipment required?

Installation is straightforward: the product injects through standard service ports with a basic manifold gauge set or with the Leak Shot Injection Kit for an even simpler process. There are no messy syringes or pressurized propellant cans involved, but certain systems require small adapters for proper service-port connection.

• Inject using manifold gauges or Leak Saver injection kit
• Automotive A/C requires 134A to 1/4" adapter
• Mini-splits often need 5/16" to 1/4" adapter
• Safe for gauges, hoses, valves, TXVs, capillary tubes, and more

Is Leak Saver safe for system components and tools?

Leak Saver is formulated to be safe for all common HVAC service tools and internal components when used as directed. It is compatible with oils, seals, valves, and standard metering devices, and it won’t harm manifold gauges or service hoses.

• Safe for expansion valves (TXV, TEV), capillary tubes, and Schrader valves
• Non-corrosive to common metals and refrigerant oils
• Circulates with refrigerant — does not clog major components in typical use
• Follow adapter guidance for mini-splits and automotive fittings

Who is this for: Leak Saver Direct Inject AC Leak Sealer is built for HVAC technicians, facility maintenance teams, refrigeration service professionals, and experienced DIYers who need a fast, practical option for sealing small refrigerant leaks without tear-downs. It’s ideal for preventative maintenance programs and systems where small pinholes or weeps are causing gradual loss of refrigerant. For large leaks, failed compressors, or completely evacuated systems, standard mechanical repairs or component replacement remain the correct approach. Leak Saver is proudly manufactured in the USA and backed by broad professional use since 2015.