ABS vs ASA for 3D printing

    Choose ABS for enclosures and housings; choose ASA for outdoor signage, mounts, and fixtures.

    ABS — starting price

    $10.00 / part

    Impact-resistant, machinable, acetone-smoothable.

    Full ABS guide

    ASA — starting price

    $10.00 / part

    Weatherproof, UV-resistant, high-temp. For outdoor parts.

    Full ASA guide

    Side by side

    PropertyABSASA
    StrengthHigh, impact-resistantHigh, impact-tough
    FlexibilitySlightSlight
    Heat resistanceHighHigh
    Outdoor / UVPoor (choose ASA)Excellent — the reason to choose it
    FinishAcetone-smoothable to a glossMatte; can be acetone-smoothed
    Density1.04 g/cm³1.07 g/cm³
    Starting price$10.00 / part$10.00 / part

    Choose ABS when…

    • Enclosures and housings
    • Mechanical parts that get drilled or tapped
    • Parts that need a smooth, glossy finish
    • Moderate-heat environments

    Reach for something else for

    • Outdoor parts — ASA resists UV where ABS yellows and gets brittle

    Choose ASA when…

    • Outdoor signage, mounts, and fixtures
    • Automotive trim and exterior parts
    • Enclosures exposed to sun or rain
    • Parts that must not yellow or crack outdoors

    Reach for something else for

    • Ultra-budget indoor prototypes — PLA is far cheaper for those

    Still not sure?

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    Questions, answered