Thinner is a type of solvent widely used in painting for diluting paint and adjusting its viscosity. It ensures the paint flows more smoothly and covers surfaces evenly, which is particularly important for spray painting and for achieving a uniform, professional finish on large surfaces. Thinner is compatible with many types of paints, including oil-based, lacquer, and enamel paints.

In addition to thinning paint, it is also used for cleaning brushes, rollers, and spray guns after use, preventing dried paint buildup on tools. Thinner can be effective for removing paint spills or splatters from surfaces but should be used cautiously on delicate materials. Proper handling and ventilation are essential, as thinners often contain chemicals that can be harmful if inhaled.