Winsor & Newton Galeria Acrylic Medium, Sand Texture Gel is a finer and more consistent texture than the pumice in Mineral Texture Gel. While natural or environmental sand can be added to acrylic color, any impurities can seriously compromise the chemistry of the paint film. Galeria Sand Texture Gel has been formulated with refined and purified sand to ensure the most interesting possible texture as well as security and durability. Details:250 mL (8.4 fl. oz.)For use with Winsor & Newton Galeria Acrylic PaintFormulated with refined and purified sand