Leak Saver Direct Inject UV Refrigerant Leak Sealer 3-Pack — UV Dye for Leak Detection, Works with All Common Refrigerants, Fits U

Leak Saver Direct Inject UV is a professional-grade refrigerant leak sealer with added UV dye that injects directly into HVAC, refrigeration, and automotive systems up to 5 tons to seal small leaks and highlight larger ones for detection.

Designed for technicians and savvy DIYers, this three-pack of Leak Saver Direct Inject UV combines a reactive sealant with fluorescent dye so you can either permanently stop minor refrigerant leaks or quickly locate bigger breaches using a UV flashlight. The product injects into closed systems using a standard manifold gauge or Leak Shot Injection Kit, is formulated to circulate safely with system oil, and works across a wide range of refrigerants and equipment types (excluding ammonia systems).

How does this sealer actually stop small refrigerant leaks?

When Leak Saver encounters air and moisture at a leak site, its active ingredients quickly react to form a durable plug that blocks the escape path. This process is intended for small leaks where the system retains most of its charge within a few days.

• Reactive polymer chemistry bonds at the leak interface to form a lasting seal.
• Circulates with oil and refrigerant so it reaches leak points throughout the circuit.
• Best results when system retains majority of refrigerant charge within 72 hours.

What equipment and adapters do I need to inject Leak Saver Direct Inject UV?

Injection is simple: attach the product to a manifold gauge set or a Leak Shot Injection Kit and introduce it into the low-side service port. Some applications require a specific adapter for proper fit.

• Standard R134a automotive systems need the R134a to 1/4" charging adapter.
• Some ductless mini-splits may require a 5/16" to 1/4" charging adapter.
• Use a basic manifold gauge set for residential and commercial HVAC work.

Will the UV dye help when the sealer can’t close a large leak?

Yes — if a leak is too large for the sealant to plug, the fluorescent dye makes the leak site easy to locate under a UV flashlight so you can patch or replace the component. The dye does not affect normal system operation and is intended purely for leak visualization.

• Bright fluorescence pinpoints external leak locations quickly.
• Allows faster diagnosis of lines, fittings, coils, and connections.
• Compatible with common UV inspection lights used in HVAC service.

Is Leak Saver Direct Inject UV compatible with my system and refrigerant?

The formula is engineered to work with virtually all commonly used refrigerants and oils (with the exception of ammonia-based systems). It is suitable for residential and light commercial systems up to approximately 5 tons as well as automotive/vehicle air conditioning systems.

• Works with R410A, R22 and replacements, R134A, R1234yf, R404A, R290, R600a, and others.
• Safe for use in central air conditioners, ductless mini-splits, heat pumps, refrigerators, and automotive AC.
• Not recommended for ammonia refrigeration systems.

Who is this for? Leak Saver Direct Inject UV is intended for HVAC professionals, refrigeration technicians, and experienced DIYers who need a rapid, low-fuss option to repair minor refrigerant leaks or to accelerate leak diagnostics on larger failures. If you handle system service with a manifold gauge or injection kit and want a product that both attempts permanent sealing and aids visual leak finding, this three-pack offers convenience, compatibility across refrigerants, and UV visibility to speed repairs. For large-scale or highly pressurized losses, plan for proper mechanical repair or component replacement after using the dye for detection.