3 LB Block Brown Microcrystalline Wax for Wax Casting Pure white microcrystalline wax which is popular for encaustic and oil techniques Several oil painting recipes also call for microcrystalline wax for use as a plasticizer More flexible than paraffin making it ideal for building up layers of textures on your painting Ensures the quality and integrity of your paint film Allowing you to apply encaustic paint over the modeled surface with minimal disturbance to the bottom sculpted surface