Description
Used Where:
HVACR systems, brake lines, pneumatic systems, gas lines and systems, fuel lines, refrigerant-based EV thermal management systems, fire suppression systems, hydraulic circuits
Used How:
- Coat all surfaces with a flat liquid free of bubbles or foam. Focus on threaded connections, joints and valves. For more information, refer to our leak detection manual.
- Bubbles will form instantly for most leaks, while micro leaks will develop foam cocoons or tiny bubble clusters over 5-30 minutes.
- Place equipment back into operation and check for vibration leaks.
- Wipe surfaces (or rinse if water is available).
Fast Facts
- Big Blu works in a temperature range of +1.7°C to +80°C. The only products that can detect leaks in temperatures lower than +1.7°C are Big Blu Brush On (-18°C to +95°C) and Big Blu Subzero (-34°C to +95°C) and they can be used while the system is running
- Oxygen safe: Unlike some competitors, Big Blu contains NO glycerine or other hydrocarbons that react with oxygen gas to produce heat, a very dangerous and possibly explosive situation
- If you have children who like making bubbles, throw some Big Blu in the bubble gun and stand back for the world’s biggest bubbles. It’s just as safe as dishwashing detergent





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