ASA (acrylonitrile-styrene-acrylate) is a technical thermoplastic material for FDM printing which is characterized by exceptional UV resistance and weather resistance. Unlike ABS — a closely related material — ASA retains its color, shape, and mechanical properties even after long-term exposure to sun, rain, and temperature changes. Parts made from ASA are rigid, impact-resistant, and can withstand continuous temperatures up to approximately 85–90 °C (HDT), making them suitable for outdoor applications that ABS and PLA cannot. The surface of an ASA part is slightly matte and can be finished with sanding, painting, or coating. In terms of price, ASA is slightly higher than ABS but is comparable to other technical FDM materials.
ASA is suitable for: outdoor brackets and mounting, vehicle parts and signs, cable holders and electronics housings for outdoor use, prototypes to be tested in real weather conditions, and consumer products with requirements for UV stability.
