Elma Ultrasonic Cleaning Chemical N10 is a neutral cleaner that is perfect for sensitive materials such as labware from metal including aluminium and its alloys, glass, ceramic, mineral and plastic materials. It removes emulsions, residues of markings and labels, ca- and mg-bound contaminations (lime soaps), light greases & oils, fingerprints and dust. The dilution rate is 2 percent in ultrasonics and 1 percent spraying. LONG SHELF LIFE: With a little of the ultrasonic solution concentrate going a very long way, you'll manage to fill your ultrasonic cleaner multiple times over with just one bottle.