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Retarder Medium is an essential tool for artists who seek greater control and flexibility in their painting techniques. This specially formulated m...

Tri-Art Retarder is a water based medium designed to slow down the drying time of acrylic colours. Mixed with colours and mediums at up to 15%, it ...

Tri-Art Retarder Gel is a thick gel format of Retarder and is formulated for use with Tri-Art's High Viscosity paints and mediums. Ideal for plein-...