Retarder for Acrylic Paints VALLEJO 60 ml – Viscosity and Drying Time Modifier

VALLEJO Retarder 60 ml is an acrylic paint additive formulated to extend open time and slightly modify viscosity for improved blending and wet-on-wet techniques. Designed for use with acrylic hobby and model paints, this retarder delays surface drying, reduces skin formation on the palette, and helps achieve smoother gradients and longer brush manipulation without visibly altering the paint color.

Advantages

This retarder increases working time and reduces fast skinning on palettes, allowing for extended blending and smoother transitions. It preserves the original colour tone and opacity of acrylic paints while delivering a more controllable consistency for detailed brushwork. A small amount provides noticeable change in drying behavior without significantly thinning the paint.

Suitable for

• Model making and miniature painting where wet-on-wet blending is required
• Layered glazing and soft gradient transitions
• Reducing brush marks during fine detail work
• Mixing on palettes to prevent premature skin formation

When it may not be suitable

VALLEJO Retarder is not intended as a substitute for flow improvers or varnishes and does not provide adhesion or protective properties. It may not be appropriate when very fast drying is needed, or when working with water-sensitive surfaces that require immediate curing. Overuse can lead to excessively long drying times, which may affect subsequent layering and handling.

Key specifications

• Volume: 60 ml
• Compatibility: formulated for acrylic paints and model hobby colours
• Main effect: extends open time and delays surface drying
• Effect on colour: minimal change to hue and opacity when used sparingly
• Typical use: mix a few drops into paint or dip the brush into the medium on the palette

How to use

Add a few drops of retarder to the acrylic paint on your palette and mix thoroughly to achieve the desired open time. For localized control, dip the brush tip into the retarder and then load with paint; this method is useful for working wet-on-wet or for blending edges. Use sparingly at first and test on a scrap surface to judge drying time before applying to the final model. Clean brushes and tools with water and appropriate brush soap after use.

What to consider before purchase

• Intended for acrylic paints—check compatibility with the specific paint brand and type you use
• Small quantities are effective—start with a few drops to avoid overly prolonged drying
• Not a replacement for varnish, flow improver, or adhesion promoters

Usage recommendations

For modelling and miniature painting, begin with one or two drops per small paint puddle and increase cautiously. Use on the palette for blending sessions to prevent skinning. Store the bottle tightly closed in a cool place to preserve performance.