Specially formulated to trace positive pressure leaks in pipelines and fittings. No need to submerge parts or lines to test. Non-flammable and non-corrosive, suitable for use on gas, air and nitrogen leaks. The micro-porous foam instantly highlights the smallest of leaks. Features a brush-on applicator in the bottle cap. Safe to use in confined areas. Meets requirements of BS EN 14291:2004. Not to be used on oxygen.