Catalyst Wedges are a new kind of tool made of engineered silicone, ergonomically designed to fit in your hand allowing direct interaction with your work. 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 Wedges are great for food crafting. Clean-up is a breeze. Wet paint wipes off clean while dried paint can be peeled off the silicone surface. Catalyst Wedges are solvent resistant and measure 12cm x 7.5cm.