A degreaser is a chemical product that dissolves water-insoluble substances (such as greases and oils) from hard surfaces such as floor, machines, tools. Degreasers can be solvent-based or solvent-containing substances, and may contain surfactants as active ingredients. The solvents used in degreasers have a dissolving action on grease and similar water-insoluble substances. An alkaline washing agent may be added to the solvent-containing degreaser to enhance its degreasing ability. Degreasers can also be produced as solvent-free, based on alkaline chemicals and/or surfactants.