Castable 3D printing filaments have been specifically designed for usage in mould casting. Castable filaments are usually wax like and print with near zero warping. After printing they are heat treated in a baking oven after which they can be used as negatives for mould casting. Alternatively, castable 3D printing filaments can be used to cast a mould in concrete, after which the 3D printed template can easily be melted out and recycled for reuse. Some castable filament have been specifically designed with certain casting processes in mind, such as metal casting.

Castable filaments are a great example of 3D printing being used to enhance the creative potential of other forms of design and making.