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Grumbacher Painting Mediums

Copal Painting Medium - A traditional 19th century painting medium prepared especially for hobbyists and decorative painters (i.e. tole painters). Made with a modern synthetic copal resin, this painting medium has all of the manipulative and drying characteristics of the original 19th century preparation. When added to oil colors it improves flow, accelerates drying, and imparts hardness and a high gloss to the dry paint film. Because this product may cause yellowing and darkening of the colors with time, we recommend its use for occasional or impermanent painting only.

Note: Product may be diluted with Pure Gum Spirits of Turpentine or Grumtine only.

Japan Drier - A reliable alkyd resin based liquid siccative intended for use by sign painters, artisans, and craftspeople. Ideal medium for oil gilding. Simply apply to an appropriate surface, allow drying to a high tack. Apply gold or silver leafing, smooth and burnish.

Note: Japan Drier is not generally recommended for fine arts applications because it has a tendency to yellow and darken oil colors over long periods of time.

Cobalt Drier - The only scientifically proven, least harmful siccative for fine art painting. Speeds drying of oil colors and oil painting mediums. Extremely strong, use sparingly by applying in drops. Do not mix directly into artists oil paints.

Note: It is strongly recommended this product be first mixed into an oil painting medium, and the resulting mixture be added into the paint. Test product before using it in a painting.

WARNING: DANGER! COMBUSTIBLE. MAYBE HARMFUL IF SWALLOWED. VAPOR HARMFUL. SHIPPING RESTRICTIONS APPLY TO HAZARDOUS MATERIALS. KEEP OUT OF REACH OF CHILDREN! Before using, carefully read CAUTIONS on back panel.


Grumbacher Cobalt Dryer 74 ml (2.5 FL/OZ)

Grumbacher Cobalt Dryer 74 ml (2.5 FL/OZ)


$18.50  $11.10
Save: 40% off




Grumbacher Copal Medium 236 ml (8 FL/OZ)

Grumbacher Copal Medium 236 ml (8 FL/OZ)


$31.60  $18.96
Save: 40% off




Grumbacher Damar Matte Varnish Spray Matte Net Weight 11 Oz (311g)

Grumbacher Damar Matte Varnish Spray Matte Net Weight 11 Oz (311g)


$16.60  $9.96
Save: 40% off




Grumbacher Damar Varnish Spray Gloss Net Weight 11 Oz (311g)

Grumbacher Damar Varnish Spray Gloss Net Weight 11 Oz (311g)


$16.70  $10.02
Save: 40% off




Grumbacher Damar Varnish Spray Retouch Net Weight 11 Oz (311g)

Grumbacher Damar Varnish Spray Retouch Net Weight 11 Oz (311g)


$16.70  $10.02
Save: 40% off




Grumbacher Japan Dryer 74 ml (2.5 FL/OZ)

Grumbacher Japan Dryer 74 ml (2.5 FL/OZ)


$13.60  $8.16
Save: 40% off




Grumbacher Picture Varnish Spray Gloss Net Weight 11 Oz (311g)

Grumbacher Picture Varnish Spray Gloss Net Weight 11 Oz (311g)


$16.70  $10.02
Save: 40% off




Grumbacher Picture Varnish Spray Matte Net Weight 11 Oz (311g)

Grumbacher Picture Varnish Spray Matte Net Weight 11 Oz (311g)


$16.70  $10.02
Save: 40% off




Rapidesign Acrylic Painting Varnish Spray 11 Oz (311g)

Rapidesign Acrylic Painting Varnish Spray 11 Oz (311g)


$15.95  $9.57
Save: 40% off