This product checks the tightness of cylinders, gas systems, compressors, pressurised tanks, pipes, tyres.It is not flammable or polluting, it does not stain, soil or promote oxidation. It does not form mixtures that combust in contact with gases. Spray at a distance of approximately 20 cm from the surface requiring testing. It will instantly identify even the tiniest gas leak by forming micro bubbles. Any dry residue can be easily removed with water.