We sell a great selection of Gouache paint and sets from a variety of brands. Gouache paint is a type of waterbased paint - essentially an opaque watercolour. Like watercolour, it can be rewet and dries to a matte finish. It is designed to be used when opacity is required in a painting and is popular with commercial artists and illustrators. Gouache paint is also widely used in fine art as an opaque water colour.