Leak Detector Blue is a HVAC and Gas Leak Detector which has set the standard for high quality and fast acting leak detectors in the market today! Leak Detector Blue produces large, consistent bubbles. It leaves a long-lasting coating wherever a leak is detected and its fluorescent blue color makes the leak easy to see under a fluorescent light. This product detects leaks in natural gas, refrigeration gas, nitrogen, air and C02. Simply spray and watch fast, even bubbles appear. Leak Detector Blue is perfect for all types and sizes of leaks, even the smallest micro leaks. Leak Detector Blue will not freeze and is perfectly formulated for both high and low temperature applications and for all types and sizes of leaks, even micro leaks. Leak Detector Blue is environmentally safe, non-toxic and non-corrosive.