All Gale Force Nine basing grit is made from a porous organic material rather than sand or other minerals. This organic material absorbs glue and paint, insuring that everything stays where you want it. When using sand (or kitty litter or any other mineral), paint and glue tend to flake off over time. Gale Force 9s entire range of Hobby Scenics are packaged in clear stackable containers, giving you a wide palette of colors that can be mixed together to create your own basing textures and colors.
Gale Force 9 GFS023 Rocky Basing Grit - B00294RFSA