Thinner is a chemical solution based on petroleum derivatives with a white color, which is very similar to water, and it is available in the market in two types: instant and oily. Thinners are solvents that can be used to reduce the concentration of colors and also have the ability to dissolve colors. Thinners are highly used in building painting. Correct choice of thinner affects paint viscosity, shear properties, sprayability, drying speed and many other properties.