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. (Item# 3580)
OPEN Thinner is a water-based additive for thinning the consistency of OPEN Acrylic Colors and Mediums without altering drying time. It also maintains and adjusts the workability of OPEN colors on palettes, and can be used as a thin-bodied retarder with Heavy Body or Fluid Acrylic colors. Because OPEN Thinner contains no binders, it does not form a film and should only be 25% or less of mixtures with acrylic colors and mediums (one part OPEN Thinner to three or more parts paint or meduim). (Item# 3595)
Neither Retarder nor OPEN thinner contain binding agents. To ensure adhesion, it is recommended that the addition of Retarder not exceed 15% (1:6), and OPEN Thinner should not exceed 25% (1:3) when mixed with colors or mediums.
For health and safety information, download the Safety Data Sheet [PDF].
Wetting Agent [formerly Acrylic Flow Release] 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. As with OPEN Thinner and Retarder, Wetting Agent contains no binder and should only be used properly dilluted per product instructions. Not for use by children. Eye Irritant. Inhalation of Spray Mist Harmful. DO NOT SPRAY APPLY(Item# 3590)