COLD WAX MEDIUM
Cold Wax can be used to make oil colors thicker and more matte. A soft paste formulated to knife consistency, Gamblin Cold Wax medium is made from naturally white unbleached beeswax, alkyd resin and odorless mineral spirits (OMS). Gamblin Cold Wax Medium can be thinned to brush consistency by dissolving in a small amount of OMS. The surface of paintings made with beeswax mediums will become only as hard as a beeswax candle. Adding Galkyd to cold wax painting medium/oil colors mix will increase the sheen and flexibility of the paint film. Use a small amount to make Galkyds more matte. Gamblin Cold Wax Medium contains no oil so it can be applied as a wax varnish over a dry oil painting.
MSDS

Please note:

• Painters who are using more than 1/3 cold wax medium to 2/3 oil paints should paint on rigid supports or paintings may crack when moved.
• By mixing 1/2 Cold Wax Medium and 1/2 G-Gel, painters can paint on flexible supports.

For more info: http://www.gamblincolors.com/img/CWM.pdf

reference: www.gamblincolors.com