Liquitex-Slow Dri Blending Gel Medium. A heavy body gel used to extend the open time of acrylics by more than 40 for easier blending. Add up to 50 without jeopardizing the strength of the paint film to achieve excellent impasto techniques. This package contains one 8 ounce bottle of Slow-Dri blending gel. Conforms to ASTM D4236. Imported.