All Mediums

OPEN Thinner is a water-based additive designed to thin the consistency of OPEN Acrylics without altering open time, as well as maintain and adjust...

Retarder is an additive used to increase the drying time of acrylic paints. Useful for wet-in-wet techniques and reducing skinning on the palette.

Wetting Agents are concentrated additives for reducing the surface tension of water, used to increase the slickness and flow of the paint. It is ef...

Retarder is an additive used to increase the drying time of acrylic paints. Useful for wet-in-wet techniques and reducing skinning on the palette.

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-...

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 ...