Acrylic retarder for use with brush or airbrush. It slows the drying time of the acrylic up to about 15%. It can be added to the paint mixture or be applied on the surface to be painted and then put on the color layer. When used correctly, they can keep the paint dry from half an hour extra to a full day's working time. Applying too much retardant, however, can prevent a layer from drying correctly for as long as the retardant is present, causing future damage to the painting unless the affected layer of paint is removed or re-mixed. Acrylic Retarder is used to counter the fast drying properties of acrylic paints making possible the usage of wet on wet or other techniques which would otherwise require oil paints Use with a brush or an airbrush to apply the acrylic retarder. 60 mL