For a variety of textural and impasto effects, use these texture gels alone, mix them with acrylic colors and mediums, or intermix them. Formulated for maximum flexibility, they can be applied to any material suitable for heavy acrylic painting. Each medium can be thinned with water and becomes water-resistant when dry. Gel Medium or Heavy Gel Medium should be added when using additional substances (like sand) to avoid brittleness, and results should be varnished to avoid foaming or clouding.