ERRECOM A/C Leak Stop Cartridge 6 mL — Polymer-Free, Reusable with R134a/R1234yf Adapters

Errecom Extreme Ultra is a compact, polymer-free A/C leak stopping cartridge designed to seal small refrigerant leaks in vehicle air conditioning systems and is compatible with all common refrigerants and lubricants.

Built and formulated in Italy by Errecom, Extreme Ultra is a reusable, refillable cartridge (US patented) intended to stop minor refrigerant losses without damaging components such as expansion valves or Schrader valves. The product is supplied with adapters for both R1234yf and R134a systems and is designed for use as a targeted repair or preventative maintenance measure when the leak is small and recoverable following a proper vacuum test.

How does Extreme Ultra stop small A/C refrigerant leaks?

Extreme Ultra uses a polymer-free sealing chemistry that does not react with moisture or oxygen, reducing the risk of blockages or deposits inside the HVAC/R circuit. It is formulated to be compatible with common refrigerants and lubricants so it disperses through the system and concentrates at micro-leak locations.

• Polymer-free formula to avoid internal clogs
• Flowable cartridge designed to distribute through lines and components
• Concentrates at microscopic leak paths to seal without mechanical repair

Can I use this cartridge with R134a and R1234yf systems?

Yes — the package includes adapters for both R134a and R1234yf, and the formula is compatible with all standard refrigerants and lubricants. It’s important to confirm the system is suitable for a leak-stop treatment before application.

• Includes R134a and R1234yf adapters for direct connection
• Works with mineral and synthetic refrigerant oils
• Compatible with commonly used automotive refrigerants

When should I use Extreme Ultra versus replacing components?

Use Extreme Ultra for small, serviceable leaks that are confirmed by a vacuum hold test and where component replacement is impractical or unnecessary. For large leaks, catastrophic damage, or failed compressors, mechanical repair or part replacement remains the recommended route.

• Perform a 5-minute vacuum test to verify suitability
• Ideal for hairline leaks, fittings, seals, and slow weeps
• Not intended as a permanent fix for major mechanical failures

How does the reusable/refillable system save money?

The Extreme Ultra application tool is reusable; after the first purchase, you can buy only the small 6 mL cartridges for subsequent treatments. This approach reduces waste and lowers recurring costs for technicians or fleet managers performing routine maintenance.

• US patented refillable cartridge design (US 11002470)
• Purchase replacement cartridges instead of whole kits
• Compact 0.2 fl oz (6 mL) cartridges for targeted dosing

Who is this for? Errecom Extreme Ultra is aimed at HVAC technicians, independent auto shops, fleet maintenance teams, and knowledgeable DIYers who need a quick, low-risk method to address small refrigerant leaks or to perform preventative maintenance. It’s best for systems that pass a vacuum test and when a non-invasive, compatibility-safe sealing solution is preferred over immediate component replacement.