Leak Saver Refrigerant Leak Sealer Direct Inject UV for AC & Automotive — Up to 5 Tons, UV Dye

Designed for HVAC technicians, fleet mechanics, and savvy DIYers, Leak Saver Direct Inject UV combines a reactive sealing formula with fluorescent dye so you can either permanently stop small leaks or easily pinpoint larger ones with a UV flashlight. The product injects straight into the system using a standard manifold gauge set or the Leak Shot Injection Kits — no messy syringes or pressurized spray cans required. It works with virtually every refrigerant and oil (except ammonia) and is suitable for central air, mini-splits, heat pumps, commercial refrigeration, and automotive A/C.

How does the direct injection method simplify repairs?

The direct-inject approach lets you add sealant into the refrigerant circuit quickly and cleanly through a service port using common HVAC tools. That reduces downtime, eliminates complicated adapters for many systems, and avoids handling pressurized aerosol cans.

• Connects with a standard manifold gauge set or Leak Shot Injection Kit.
• No syringes, messy hoses, or pressurized cans to manage.
• Automotive A/C needs a 134a to 1/4” charging adapter; some mini-splits require 5/16” to 1/4”.
• Clear instructions help preserve proper refrigerant charge while injecting.

Will this product actually stop refrigerant leaks or just hide them?

Leak Saver Direct Inject UV is formulated to react at leak sites, forming a durable seal for small leaks when the system retains most of its charge for 72 hours. For larger leaks, the added UV dye makes the leak visible under a UV flashlight so you can repair the source rather than relying solely on sealant.

• Reactive chemistry interacts with air and moisture at the leak to form a seal.
• Effective for small leaks where the refrigerant charge is mostly retained.
• UV dye reveals larger leak paths for targeted mechanical repair.
• Used for preventative circulation to reduce future small leaks.

Is Leak Saver UV compatible with my system and refrigerant?

The formula is broadly compatible across HVAC and refrigeration equipment and works with almost all refrigerants and oils, providing flexibility for technicians who service mixed fleets of systems. The only exception is ammonia-based systems.

• Compatible with R410A, R22 and its replacements, R134a, R1234yf, R404A, R290, R600a, and more.
• Safe with most compressor oils and microchannel coils when used per instructions.
• Not for ammonia (NH3) refrigeration systems.
• Appropriate for central ACs, mini-splits, automotive A/C, heat pumps, and commercial refrigeration.

How should I find and confirm a leak using the UV dye?

After injecting Leak Saver Direct Inject UV and allowing circulation, inspect the system with a UV flashlight in a dim environment. The dye fluoresces at the leak point, making it easy to see oil or dye deposits that indicate the leak location for repair or further diagnostics.

• Run the system to circulate the product before inspection.
• Use a bright UV flashlight and darkened area for best visibility.
• Look for bright fluorescent traces on fittings, hoses, coils, and joints.
• If a large leak is found, perform mechanical repair and recharge as needed.

Who is this for: Leak Saver Direct Inject UV is intended for HVAC professionals, commercial refrigeration technicians, automotive A/C specialists, and competent DIYers who are comfortable working with refrigerant service tools. It’s ideal when you need a fast, convenient way to stop minor leaks or quickly identify larger leaks for repair across a wide range of refrigerants and system types. For ammonia systems, consult a qualified service provider and avoid using this product.