GAC 100 is a thin, transparent acrylic polymer medium used to extend and dilute acrylic paints without dulling their film. It wets out pigments more readily than most polymers, which makes it a favorite for mixing your own paints from dry pigment and for thinning heavy-body acrylics. It is the most flexible of Golden's GAC line and forms a strong, glossy, moderately tacky film. Its other common job is as an isolation coat over a finished painting before varnishing, or on raw canvas before gesso to block migration from the substrate.
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Artists who use GAC 100 tend to rate it highly as a pigment-dispersing medium and isolation coat, praising how easily it wets out solids and how flexible the dried film stays. Complaints center on its gloss and slight tack, which some find unsuitable when they want a flat, non-sticky surface.
GOLDEN Polymer GAC 100 is an all-around medium for extending and diluting acrylic paints. It has a flowable, liquid consistency, forms a strong film and stays flexible. It wets out solids more readily than other polymers, which makes it useful for making your own acrylic paints.
GAC 100 is the most flexible of GOLDEN's GAC mediums. It can be used as an isolation coat on paintings before varnishing, or on raw canvas before gessoing, to prevent substances from migrating from the canvas into the paint layers. It has moderate tack and gloss.
