Rad Mix - Kodiak ProWhile Maker Mix comes fully blended, RADmix allows you to add your own cement and sands, giving you more control over the final product. Whether you prefer grey Portland cement or want to experiment with decorative sands for a terrazzo or exposed aggregate finish, RADmix gives you the flexibility to create your signature look. With RADmix, you get all the high tech benefits of Maker Mix, with the freedom to customize and save where it matters most.