Golden brand retarder is an additive for acrylics, used to increase drying time, enabling artists to work for longer periods on their projects. It also reduces hardening of colours on a palette, and is useful for work-on-damp techniques. Available in 120-ml (4 oz) and 250-ml (8 oz) sizes.
Practical information: Delicately mix no more than 15% of retardant with acrylics.