Code: 15400005-39 It is used for the safe, easy and fast detection of cracks or leaks in gas lines. WEICON Leak Detection Spray does not reveal any hazardous components with carbon dioxide (CO2), propane, butane, acetylene, oxygen, city gases or natural gases. Leak Detection Spray compressed air It can be used when natural or liquid gases are treated and leak points occur in fittings, threaded joints and connections. It greatly contributes to the safety of pneumatic brakes and gas lines.