A colorless acrylic additive that slows drying time. Mix retarder directly into acrylic colors and/or painting mediums or brush directly onto the support and painted over. Ideal for detailed blending work. May be safely used in ratios up to 30-percent to volume. For longest drying time, use maximum percentage of retarder to color/medium. Keep tube tightly closed when not in use. Do not mix with oils or Turpentine. Wash brushes and equipment with soap and water after use. Made in USA.