Liquitex Slow-Dri Blending Mediums- Medium: gel- Size: 237 ml. jar. This uniquely formulated medium extends the drying time of acrylics by up to 40%. It also improves flow, enhances depth of color intensity, increases transparency and gloss, and adds flexibility and adhesion to paint film. Translucent when wet, Slow-Dri Blending Fluid dries to a transparent, water resistant, flexible, and non-yellowing surface.