The GAC 800 is a medium that aides the flow and transportation during an acrylic pour. Avoid crevices appearing (crazing) and cracking as well as ensuring longevity of your acrylic pour art.
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GAC 800 is a low-crazing extender for pouring acrylic colors. "Crazing" is the formation crevices in surfaces that develop as acrylic paints and mediums dry. The addition of GAC 800 promotes drying with a smooth, even film, good gloss and flexibility, but with moderate clarity. GAC 800 is also useful for adhesion to chalky surfaces. A good guide to start with is a using this to a ratio of 10:1 that's 10 parts GAC 800 and 1 part acrylic fluid based paint.