This is a Vallejo Diorama Effects Sandy Paste 200ml

Perfect for either basing your miniatures or building terrain pieces. The Diorama Effects range offers the modeler everything needed for the reproduction of a terrain, with effects of sandy and dusty roads, or of snow, mud and water, all of which add to the realism of the setting and relate the miniature to its environment.
Diorama Effects is not flammable, and does not contain solvents.

A sand colored, gritty acrylic paste of medium viscosity. Mixed with Heavy Gel it spreads even more smoothly to form an excellent surface for drawing with pastels.