The best creations call for the best materials. With a tradition of providing the best for more than 100 years, you can count on Grumbacher for professional quality and consistent performance time after time. These Artists' Acrylic Mediums meet the highest standards, and when used to alter paint characteristics such as flow, transparency, gloss, and drying time, allow you to create a virtually endless array of creative effects.
Acrylic Retarder — Extend the working time of your acrylic paints with Grumbacher Artists' Acrylic Retarder. This slow-drying additive may be mixed directly into acrylic colors or with other painting mediums in ratios of up to 30% to volume. For the longest drying time, use the maximum percentage of retarder to color or medium.
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