LD-90 is a water-based non-flammable professional-grade gas leak detector formulated without solvents, silicones or oils which quickly and safely identifies gas and air leaks in pipework, valves and other fittings. LD-90 highlights nonvisible leaks even on low-pressure systems. Use to trace leaks for all types of gases, forms highly visible bubbles. Suitable for use by heating engineers to check that gas pipes are sealed and there are no appearances of leaks. Conforms to BS EN 14291:2004 (VOSA MOT Testing) and MIL-L-25567 (oxygen system compatibility).