Errecom External (TR1166.A.01) is a ready-to-use, two-part putty that seals refrigerant leaks up to 5 mm on metal and rubber lines. Built for Aussie tradies who need a fast, tidy field fix to get systems running and avoid costly downtime. Fair dinkum time-saver when you’re under the pump.

Key features & trade benefits

• Seals up to 5 mm pinholes/cracks — get a solid external seal fast and bring systems back online without immediate brazing.
• Works on copper, aluminium, steel & rubber — one stick covers most line materials you see on site.
• Refrigerant-ready (incl. R32, R1234yf, CO₂) — no guesswork about compatibility.
• Temp range −100 °C to +270 °C — reliable from cold rooms to hot plant decks.
• Pressure-rated: 1 mm ≈ 57 bar; 5 mm ≈ 40 bar — know your limits and reduce call-backs.
• Oil & flush resistant (POE, PAG, PAO, mineral, AB) — won’t turn to mush when the system runs.
• Simple hand-mix application — no power, no torch, no worries.

Why this product matters

Late Friday arvo, supermarket cool room showing warm temps and a tiny suction line crack. Tech kneads External, wraps the leak, waits for initial set, and the case temps start dropping again. System stays stable overnight; permanent pipe section replacement is done first thing Saturday. Result? Zero stock loss and no grumpy manager. She’ll be right.

For a full leak-finding workflow, pair this with our refrigerant leak detectors to pinpoint and verify repairs before hand-over.

Pro tip

Clean and degrease the pipe before application for best adhesion. After wrapping, you can accelerate curing with gentle heat (heat gun ~5 min) to cut total dry time to about an hour for handling. Gloves on, mate.

Compatibility & system info

• Refrigerants: CFC, HFC, HCFC, R134a, R32, R1234yf, CO₂.
• Lubricants: Mineral, POE, PAG, PAO, Alkylbenzene.
• Line materials: Copper, aluminium, steel, thermoplastic/rubber sections.
• Sides: Suitable for high or low pressure lines (observe pressure guidance below).

Built for Aussie conditions

On a tin roof in Sydney summer or a steamy plant room in Brisbane, you need a fix that won’t slump when it’s scorching. External holds firm across the extremes so you can finish the job and clock off.

What’s included

• 1 × External Leak Stop Paste (TR1166.A.01)
• 1 × Cardboard storage box

Specifications

Warranty & returns

Covered by HVAC Shop’s standard returns policy. See Shipping & Returns for details.

Use in line with Australian refrigerant handling rules. Technicians must be licensed for RAC work.

FAQs

Is this a permanent fix?
It’s a tough, long-lasting external seal that’s ideal for emergencies and uptime. For long-term compliance, schedule a permanent repair (e.g., pipe section replacement/braze) when practical.

How long to cure?
Allow ~24 hours for full cure. Need it faster? Warm with a heat gun for ~5 minutes to reach ~1 hour handling.

Can I use it on high-side lines?
Yes, observe the pressure guidance (approx. 57 bar at 1 mm; 40 bar at 5 mm) and always verify with a pressure test.

What prep is required?
Clean and dry the surface thoroughly. Degreasing is key to adhesion and fewer call-backs.

Related products

• TIFXP-1A Refrigerant Leak Detector — quickly confirm your repair and scan nearby joints before sign-off.
• Viper Big Blu Brush On — brush a film over the repair for a simple bubble test. Too easy.
• Errecom Brilliant UV Dye (60 ml) — add a trace to help find slow, tricky leaks on the next visit.