71029 - Microbubble Leak Detector - 1 GallonBlue Monster 71029 Microbubble Leak Detector 1 Gallon Blue Monster leak detector is a sensitive solution formulated to detect even the smallest of leaks in air and gas lines, tanks, cylinders, valves, fittings, pipelines, and other suspect areas. Blue Monster's dependable formula provides long lasting leak detection up to 10 minutes after application. Ideal for identifying leaks in refrigeration and air conditioning systems, this easy to use leak