Golden Gac-400 Acrylic Heat Set 8 oz

The hardest and least flexible of any Golden Acrylic product. Caution is advised when using this product alone.
Used in its pure form, it is limited to applications on rigid supports, as its lack of flexibility may lead to cracking when flexed. Under certain conditions, the medium alone may crack upon drying.
Ideal as an additive to acrylic paints to increase film hardness and reduce dry film tack.
Improves adhesion to non-porous surfaces; however some surfaces, such as glass and glazed tile, will not allow for a permanent bond
Dries with high gloss and excellent film clarity.
Promotes cleaner edges of hard-edge techniques. The harder paint film has less "pull" as the masking tape is removed.
Golden GAC (short for Golden Artist Colors) Specialty Acrylic Polymers are based on 100% acrylic polymer emulsions. The GACs are useful as mediums or modifiers of acrylic paints. GACs can be blended with Golden Acrylic Paints to extend the paint, regulate transparency, create glazes, increase gloss, reduce viscosity or improve adhesion and film integrity. The GAC polymers can also be used for binding pigment solids for various effects and surfaces. Unlike the other Golden Mediums and Gels, GAC Acrylic Polymers have only a minimum amount of thickeners, levelers, defoamers and surfactants to ensure good film formation.
The consistency of the GAC polymers is very fluid and thinner than other Golden Mediums. Since they do not have thickeners added, these polymers will reduce the thickness of most Golden Acrylic Paints. Golden Fluid Acrylics are slightly thicker than the GACs, but will be the color line least changed in viscosity with any addition of a GAC polymer.
Each GAC product represents a unique polymer that offers certain specific attributes. Therefore, each GAC will have its own unique benefits and applications. Refer to the individual product description of each GAC below to find the proper medium to use for a particular application.