ASA is a 3d printable plastic with similar properties to ABS. Compared with ABS, ASA has better UV stability and high chemical resistance. It is more difficult to print with than ABS though. If you are printing a part that needs to be weather resistant, ASA’s improved thermal, chemical and weather resistance, makes ASA your go-to filament choice. Most printers use ASA to print using FDM 3d printing process.