Not quite a brush, not quite a palette knife. Catalyst Blades, mounted on artist brush handles, offer a blend of tradition and innovation. Designed for use with heavy-bodied paints, Catalyst is at home with oils, acrylics, and water-miscible oils. Because they are heat-resistant, they excel with encaustics. Made of FDA-approved silicone, Catalyst Blades are great for food crafting. Clean-up is a breeze. 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. Blades can be separated from their wood handles for cleaning and easily replaced when dry.