BioClean® Auto Parts Cleaner is a concentrated bioremediating fluid for cleaning metal parts. BioClean® Auto Parts Cleaner is a water-based solutions that, unlike petroleum-based solvents, are typically nonflammable and contain little or no VOCs. Instead of dissolving grease and solids, aqueous cleaners rely on heat, agitation, and soap action to break dirt into smaller particles. Although they clean differently, aqueous cleaners perform as well as solvents. Aqueous cleaners are defined as waterbased cleaners that contain less than 5% (50 grams per liter) of VOCs. The California South Coast Air Quality Management District maintains a list of aqueous solutions that are certified to contain less than 5% of VOCs.