Water-based smoke fluid ready for use, designed to produce a high-density, extremely long-lasting fog effect. The odorless, non-toxic and non-flammable composition is free from glycerine and diethylene glycol. It is biodegradable according to OECD 301E/EEC 84/449 C3 and has no transport restrictions or hazardous-material classification. The fluid is manufactured in Germany and is suitable for clubs, dance schools, fire departments and stage applications.