Designed for use with heavy-bodied paints, these wedges are made of engineered silicone and are ergonomically designed to fit in the hand allowing a direct interaction with art work. They are ideal for oils, acrylics and water-miscible oils, and because they are heat-resistant, they excel at encaustics as well. They also work well with plaster, clay and even frosting. Made of FDA-approved silicone, they are also are great for food crafting. The silicone is easy to wipe clean and is solvent resistant. Clean up in most cases can be done with mild soap and water. Dried paint can be peeled off the silicone surface. Brand: Princeton Art & Brush