HVACR systems, brake lines, pneumatic systems, gas lines and systems, fuel lines, refrigerant-based EV thermal management systems, fire suppression systems, hydraulic circuits

1. 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.
2. Bubbles will form instantly for most leaks, while micro leaks will develop foam cocoons or tiny bubble clusters over 5-30 minutes.
3. Place equipment back into operation and check for vibration leaks.
4. Wipe surfaces (or rinse if water is available).

• Big Blu Brush On works in a temperature range of -18°C to +95°C and 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