When it is a Catalyst Tool from Princeton Artist Brush Company. Crafted from flexible silicone or hard nylon to allow artists a new form of expression. Catalyst™ Blades, Mini-Blades, Wedges, and Contours come in unique shapes for a variety of different textures in your art. Designed for use with heavy-bodied paints, Catalyst is at home with oils, acrylics, and water-miscible oils. Because they are heat-resistant to 450 °F, they excel with encaustics. Artists are using them with plaster, clay, surface coating, food crafting, and much more.
Princeton Catalyst Blades and Mini-Blades
Watch this video to see the Catalyst Blades in action:
If you want to "push" a lot of paint around then the Catalyst Wedge will be your go-to tool. Not quite a brush. Not quite a palette knife the Catalyst™ Wedges are ergonomically designed to fit in your hand allowing a direct interaction with your work.
Princeton Catalyst Wedges
Watch this video to see the Catalyst Blades in action: