Grumbacher 529 5.07-Ounce Acrylic Retarder (HYSLO) Tube
Price 11.99 - 24.71 USD
An additive for slowing drying time. Mix retarder directly into acrylic colors and/or painting mediums. 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.