Xylene is used as a solvent. In this application, the mixture of isomers is often referred to as xylenes or xylol. Solvent xylene often contains a small percentage of ethylbenzene. Like the individual isomers, the mixture is colorless, sweet-smelling, and highly flammable. Areas of application include printing, rubber, and leather industries. It is a common component of ink, rubber, adhesive, and leather industries. In thinning paints and varnishes, it can be substituted for toluene where slower drying is desired. It can be used as a cleaning agent, e.g., for steel, silicon wafers, and integrated circuits.