Catalyst Contours are a great new way to shape acrylic and oil paints as well as different mediums such as ceramic plaster and are even FDA approved to use for cake decorating and food crafting! Made out of heat-resistant solid nylon, they excel with encaustics. Their ergonomic design fits comfortably in your hand to make any sculpting, shaping or texturing even easier. And clean up is a breeze with the Contours; most messes come off with soap and water. Dried paint can be peeled off and the Contours are even dishwasher safe. Then when you're done using them, just hang them up with their handy hanging holes.