Leak Saver Direct Inject UV Refrigerant Leak Sealer — 6-Pack with UV Dye, Fits Up to 5-Ton Systems

Leak Saver Direct Inject UV is a refrigerant leak sealer that injects directly into HVAC, refrigeration, and automotive systems to seal small leaks and adds a UV dye to reveal larger leaks.

Designed for technicians and DIYers, this six-pack of Leak Saver Direct Inject UV offers a straightforward injection method that works with standard manifold gauges and common charging adapters. The formula reacts at leak sites to form permanent seals for small losses and carries a fluorescent dye to help locate leaks that require repair. It’s engineered to be broadly compatible with most refrigerants and oils (except ammonia) and suits systems up to about five tons.

How do I inject Leak Saver Direct Inject UV into my system?

Injection is done directly through a service port using a manifold gauge set or the Leak Shot Injection Kits for a cleaner workflow. Automotive R134A systems need a 1/4" charging adapter, and some mini-splits may require a 5/16" to 1/4" adapter.

• Connect manifold gauges to low-side service port.
• Attach Leak Saver injector or Leak Shot kit per instructions.
• Introduce product into refrigerant line while system is off or per procedure.
• Restore normal operation and allow circulation; check after 24–72 hours.

What kinds of leaks will this product fix and when will I see results?

The formula is intended to seal small to moderate leaks where the system retains most of its refrigerant charge for at least 72 hours. It reacts with air and moisture at the leak site to create a durable seal; results depend on leak size and system condition.

• Effective on pinholes, small fittings leaks, and slow weeps.
• Not intended for very large ruptures or total refrigerant loss.
• Check system performance and visually inspect for the UV glow after allowing circulation.

Which systems and refrigerants are compatible with Leak Saver Direct Inject UV?

Leak Saver Direct Inject UV is formulated to be broadly compatible with most HVAC and refrigeration equipment, including residential, commercial, and automotive systems up to about five tons. It works with commonly used refrigerants and oils but should not be used in ammonia systems.

• Works with R410A, R22 and replacements, R134A, R1234yf, R404A, R290, R600a, and more.
• Compatible with mineral, alkylbenzene, and polyolester oils.
• Safe for coils, compressors, and lines when used per instructions.

How does the added UV dye help diagnose leaks?

The built-in fluorescent dye circulates with the refrigerant and will fluoresce under a UV flashlight at leak points, making larger or hard-to-find leaks easier to locate. This helps you determine if a leak is too large for a sealant and needs mechanical repair.

• Use a UV flashlight to scan suspected leak areas like fittings and coils.
• Bright fluorescence identifies active leak locations quickly.
• If dye concentrates at a large opening, plan for a conventional repair.

Who is this for: Leak Saver Direct Inject UV is intended for HVAC and refrigeration technicians, service shops, and knowledgeable DIYers who need a fast, non-invasive option to seal minor refrigerant leaks or to detect larger leaks. Choose this product if you want an easy injection method, broad refrigerant compatibility, and the convenience of an integrated UV dye to speed diagnostics and avoid unnecessary disassembly. Always follow system manufacturer guidelines and local regulations when adding any product to refrigerant systems.