Pumice Gels (L-R Fine, Coarse, Extra Coarse) textures dry to hard films. They mix well with GOLDEN Acrylic Colors. Fine Pumice Gel is useful as a drawing ground. Coarse Pumice Gel and Extra Coarse Pumice Gel create more coarse textures with sand-like pumice granules to yield concrete-like finishes. (Item# Fine - 3195, Coarse - 3200, Extra Coarse - 3205)