Viper Big Blu Micro Leak Detector – 1 L (RT100S) is the trade-trusted, NSF-certified, non-corrosive bubble solution for finding refrigerant and gas leaks fast. It detects micro leaks down to 0.65 oz/yr (≈18.5 g/yr) and is safe on any gas, including hospital-grade oxygen. Operating range: +1.7 °C to +80 °C. Fair dinkum, it’s the bottle you want in the van for reliable, visible results.

Key Features & Trade Benefits

• Micro-leak detection – Film-forming liquid reveals leaks as small as 0.65 oz/yr (≈18.5 g/yr) so you can nail tricky faults and cut call-backs.
• NSF food-safe & oxygen-safe – Certified for food areas and safe on O₂ lines; perfect for mixed commercial sites.
• Non-corrosive formulation – Won’t attack metals, plastics, or rubber; kinder on coils, valves and seals.
• Wide temp window – Works from +1.7 °C to +80 °C, so the bubbles keep forming in hot plant rooms and cooler spaces.
• 1 L spray bottle – Generous size for site work; persistent foam clings to overhead joints and hard-to-see threads.

Why This Product Matters

On a humid Brisbane rooftop, a split kept tripping on low charge. Electronic sniffer got you close, but the flare nut still looked clean. A sweep of Big Blu and—there it is—tiny white foam clusters creeping from the thread. Re-flare, torque, re-test. No dramas, system back to spec. When you’re chasing micro leaks, visual confirmation saves time and keeps the job fair dinkum professional.

After you’ve confirmed with bubbles, finish with an electronic check from our Leak Detectors range for documentation and peace of mind. For a practical step-by-step process, read our guide on how to use an HVAC leak detector.

Pro Tip

Kill power, isolate, then apply a flat, bubble-free film on suspected joints. Give micro leaks up to 5–30 minutes to bloom into foam “cocoons”—especially on cold lines. Re-check under operation for vibration leaks. It’s a ripper combo with a reference leak to keep your electronic detector honest.

Compatibility & System Info

• Gases: Any grade (incl. oxygen).
• Typical uses: HVAC/R lines, brake & fuel lines, pneumatic & hydraulic circuits, EV refrigerant loops, fire suppression checks.
• Operating temp: +1.7 °C to +80 °C.
• Format: 1 L spray bottle (ready-to-use).

How to Use

1. Disconnect power where required and ensure area is safe.
2. Coat threads, joints, valves and suspect surfaces with a flat liquid film (no bubbles on application).
3. Watch for instant bubbling; for micro leaks, wait 5–30 min for white foam clusters to appear.
4. Restore operation and check for vibration-induced leaks.
5. Wipe or rinse if needed. See the Leak Detection Manual for detail.

What’s Included

• 1 × Viper Big Blu Micro Leak Detector – 1 L spray bottle

Specifications

Specs validated against manufacturer literature and AU distributors. :contentReference[oaicite:14]{index=14}

Warranty & Returns

Backed by HVAC Shop support and fast AU shipping. For details see Shipping & Returns. No worries.

FAQs

Q: Can I use Big Blu on oxygen lines?
Yes. It’s certified safe for oxygen and food-area use. Always follow site procedures.

Q: How small a leak will it show?
It can reveal micro leaks down to 0.65 oz/yr (≈18.5 g/yr); give micro leaks up to 30 min to develop foam clusters.

Q: Will it corrode coils or valves?
No—formula is non-corrosive and safe on metals, plastics and rubber.

Related Products

• Testo 316-3 Electronic Leak Detector — handy to confirm and document tiny leaks after the bubble test.
• INFICON D-TEK 3 Leak Detector — quick sensor swap and optional CO₂ sensor for diverse sites.
• INFICON TEK-Check Reference Leak — verify your detector sensitivity (0.4 oz/yr R-134a) before the job.
• For a broader comparison of detector types before you buy, read our Types of Leak Detectors Guide.