Use this additive with Liquitex Acrylics to extend drying time. It increases transparency when floating, shading, blending, and washing colors. Use Slow-Dri Fluid Retarder in place of water before loading the brush with paint to eliminate drag and improve flow. It helps to reduce paint skinning on the palette and is excellent for liner work, transparent washes, and wet-on-wet techniques. Cleans up with soap and water.