Sale Sandable Hard Gesso (237ml)

Golden Sandable Hard Gesso (237ml)

  • Acrylic painting medium
  • Produces surfaces that are smoother and more even
  • For use on inflexible substrates
  • Apply in multiple thin layers
  • Made in the USA

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Golden Sandable Hard Gesso is formulated with 100% acrylic dispersion polymer and can be sanded to provide surfaces that are smoother and more even than those created using regular gesso. It contains high levels of titanium dioxide, calcium carbonate, and other inert solids to produce an easily sanded surface.

Only use on inflexible substrates such as hardboard, wood or metal panels. Potential for cracking may occur if used on highly absorbent surfaces, like canvas, even when adhered to a rigid surface beforehand. Apply in multiple thin layers, gradually building up to the desired thickness. Single thick layers could crack upon drying.

When sanding, follow these general guidelines:

  • Allow Sandable Hard Gesso to dry completely before sanding. Cured acrylic films are easier to sand.
  • Start with coarser grit sandpapers, followed by subsequently finer grits until desired smoothness is achieved.
  • Both wet and dry sandpapers may be used.
  • Wet sanding generates less airborne dust and tends to produce a smoother surface than dry sanding.
  • Sanding to a glossy (polished) surface can reduce mechanical adhesion of paint films. As always, test for your application.
  • Upon completion of sanding, use a damp, soft cloth to remove sanding dust particles from the surface. Failure to do so can cause poor adhesion.

Brushing: This product may be diluted with up to 20% water for ease of brush application.

Spraying: Dilute Sandable Hard Gesso with Golden Airbrush Medium. Begin at a 2:1 ratio (Gesso:Medium) and test spray quality, as various spray equipment may require additional thinning. Further reduce viscosity by adding up to 20% water.

Acrylic Painting: To reduce yellowing caused by Support Induced Discoloration (S.I.D.) when painting on supports that contain water soluble impurities, such as canvas and wood panels, first apply two coats of Gloss Medium and allow to dry thoroughly. Then apply the desired number of coats of Sandable Hard Gesso.

Oil Painting: Apply oil paints to 2 or more coats of Sandable Hard Gesso.To protect natural substrates from linseed oil acids, apply 2-3 coats of GAC 100 or Gloss directly on the raw canvas first. Allow the acrylic products sufficient time to cure before applying oil paints in order to maximise mechanical adhesion

Please note: This product is designed for rigid substrates only and is NOT to be used on flexible materials, as cracking may occur.

About Golden Mediums

Golden offer the widest range of mediums for acrylic painting. Their range includes gels, additives and effect pastes, which allows you to choose whatever qualities you desire for your acrylic painting: luminous glazes, gritty opaque structures, string effects, glassy areas or variable drying times. This expansive range gives rise to inspiring possibilities that allow you to do very unusual things. Whatever your needs, our Golden range has you covered.

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