Catalyst Contours are an innovative line of silicone artist tools from Princeton. These heat-resistant, solvent-resistant implements are made from nylon and silicon; easy to handle and easy to clean. The Catalyst Contours are available in three series: Contour Series 20, 60 and 80. The 20 and 60 series offer a variety of saw toothed, scalloped and notched edges, while the 80 series contours have rounded, spatula-like edges. Catalyst Contours are also dishwasher safe and FDA-approved, perfect not only for painting, encaustics and ceramics, but also for food crafting.