Additives can be used to modify properties of acrylic paints and mediums by increasing drying time or increasing the flow of the paint.
Retarder is an additive used to increase the open (drying) time of acrylic paints. Useful for wet in wet techniques and reducing skinning on the palette.
OPEN Thinner is a water-based additive for thinning the consistency of OPEN Acrylic Colors and Mediums without altering drying time.
Wetting Aid is a concentrated additive used to reduce surface tension of the water in the acrylic emulsion, thereby increasing the slickness and flow of the paint. It is effective for achieving rich stains on a porous surface.