Kills the germs that can cause nail infections. Safe to use. Acid Alcohol and odor free. ClearZal kills 99.9% of all the fungus bacteria and viruses which may cause nail infection. ClearZal nail system is a clinically tested topical antimicrobial solution that kills 99.9% of the microbes which can cause nail infections. This broad spectrum antimicrobial solution also contains Aloe for its healing and soothing properties.