GALKYD SLOW DRY
Galkyd Slow Dry is formulated to have strength and flexibility and to keep the surface of oil paintings open for approximately three days. This is a good choice for painters who blend or work wet into wet. Use 1 part Galkyd Slow Dry and 1 part oil colors to paint wet into wet for at least a day. DO NOT DILUTE.
MSDS

Galkyd Slow Dry is available in the following sizes: 2 oz, 8 oz, 16 oz.

To slow down the drying time of Galkyd and Galkyd Lite, add about 10% by volume Alkali Refined Linseed Oil or Poppy Oil. The Galkyds can be thinned by adding OMS. Robert Gamblin recommends diluting Galkyd by no more than 50% Galkyd and 50% OMS.

To make the Galkyds more matte, dissolve one teaspoon of Gamblin Cold Wax in enough OMS to dissolve the wax completely. This solution is the matting agent. Add 1/4 matting agent to 3/4 Galkyd to make a more matte finish.

reference: www.gamblincolors.com