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Understanding ASA and ABS Filaments for 3D Printing

The Basics of 3D Printing Filaments

Understanding how to select the right 3D printing filament is crucial for your project’s success. Stop settling for less in your 3D prints! Discover the difference between ASA and ABS and see which one elevates your project. Both Acrylonitrile Styrene Acrylate (ASA) and Acrylonitrile Butadiene Styrene (ABS) are thermoplastics renowned for their distinct characteristics, offering versatility for various applications. Whether you’re working on outdoor projects requiring UV resistance or need durable parts for mechanical use, understanding the differences between ASA and ABS can transform the way you approach 3D printing, ensuring your creations are not only effective but also long-lasting.

What is ASA and ABS?

ASA (Acrylonitrile Styrene Acrylate) is highly regarded for its exceptional UV and weather resistance, making it an ideal choice for a wide range of outdoor applications. Whether it’s outdoor signage, automotive exterior trims, or even garden furniture, ASA stands strong against the harshest elements, ensuring long-lasting durability and vibrant colors.

On the other hand, ABS (Acrylonitrile Butadiene Styrene) is widely recognized for its superior strength and heat resistance. This versatile thermoplastic is commonly utilized in various industries, such as automotive manufacturing and electronics. From sturdy automotive parts to protective electronic housings, ABS proves its reliability in demanding environments, ensuring optimal performance and longevity.

In summary, ASA and ABS offer distinct advantages in different applications, providing reliable solutions that meet the specific requirements of diverse industries.

Comparing ASA and ABS Filaments: Key Differences

Weather and UV Resistance

ASA Filaments: Known for superior UV resistance, ASA is ideal for outdoor applications where exposure to sunlight is a constant. This resistance ensures the longevity of prints without color fading or material degradation.

ABS Filaments: While durable, ABS lacks the UV resistance of ASA. It’s more prone to degradation when exposed to sunlight over extended periods, making it less suitable for outdoor use.

Temperature and Impact Resistance

ASA: Offers good heat resistance, maintaining its integrity in varying temperatures, which is essential for applications in fluctuating environments.

ABS: Known for its high temperature resistance, ABS can withstand higher temperatures without losing its structural integrity, making it suitable for objects subjected to heat.

Flexibility and Durability

ASA: Exhibits greater flexibility compared to ABS, making it suitable for prints that require some degree of bending or flexibility.

ABS: Has a rigid structure, providing increased durability for objects that need to maintain their shape under stress.

Advantages and Disadvantages of ASA and ABS Filaments

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  • Excellent UV and weather resistance.
  • Good flexibility and durability.
  • Maintains color and properties over time in outdoor settings.
  • Good layer adhesion with proper bed temperature.


  • High-temperature resistance makes it suitable for objects exposed to heat.
  • Rigid and durable, suitable for high-strength applications.
  • Good bed adhesion with a heated bed and appropriate surface preparation (like a glue stick).
  • Widely available and cost-effective.



  • Can be more challenging to print due to its higher print and bed temperatures.
  • May require more precise printing environments to avoid warping.


  • Emits fumes during printing, necessitating a well-ventilated area.
  • Prone to warping if not printed on a properly heated bed.
  • Less UV resistant, leading to potential degradation if used outdoors without treatment.

Applications of ASA and ABS Filaments in 3D Printing

Outdoor and Automotive Applications of ASA

ASA filaments, known for their UV and water resistance, are ideal for outdoor applications. These include:

  • Automotive Parts: ASA’s UV resistance makes it suitable for external automotive components that are exposed to sunlight.
  • Outdoor Signage: Its weather-resistant properties are perfect for signs and displays that need to endure various weather conditions.
  • Marine Applications: Boating accessories and parts benefit from ASA’s resistance to water and sun exposure.

Indoor and Functional Uses of ABS

ABS filaments are preferred for their strength and flexibility, making them suitable for:

  • Consumer Electronics: ABS is widely used in the casing of electronic devices due to its durability and heat resistance.
  • Toys and Models: Its strength and ease of printing make ABS a popular choice for creating toys and detailed models.
  • Prototyping: ABS is often used in prototyping parts for various industries due to its durability and easy machining.

Specialized Applications

Both ASA and ABS have unique applications due to their specific properties:

  • Custom Tools and Jigs: ABS’s strength is advantageous for creating durable tools and jigs in workshops.
  • Sporting Equipment: ASA’s resistance to outdoor elements makes it ideal for sports equipment that requires durability and UV resistance.

Selecting the Ideal Filament for Your 3D Printing Project

Tailoring to Your Needs

Your choice between ASA and ABS should align with the project’s specific requirements. For outdoor projects exposed to sunlight and weather, ASA is preferable. For durable, heat-resistant indoor items, ABS is the better choice.

Environmental Factors

ASA: Its water-resistant and UV-resistant properties make it a top choice for items that will be exposed to the elements, such as outdoor signage or automotive parts.

ABS: More suitable for indoor applications where UV light and moisture exposure are minimal, such as in making toys, tools, or electronic housings.

Print Settings and Bed Temperatures

ASA: Requires careful handling of print settings. A heated bed with temperatures ranging from 80°C to 100°C is recommended for optimal bed adhesion.

ABS: Also needs a heated bed, typically at slightly lower temperatures than ASA (around 70°C to 90°C). Both require fine-tuning of the printer’s settings for the best print quality.

Print Environment

ASA: Can be printed in a standard indoor environment but benefits from a stable temperature to avoid warping.

ABS: Requires a well-ventilated area due to the fumes it emits during printing, which can be harmful if inhaled in confined spaces.

Practical Tips for Printing with ASA and ABS Filaments

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Optimizing Print Quality

  • Part Cooling Fan: Utilizing a part cooling fan is crucial for both ASA and ABS. It helps in rapid cooling, reducing warping and improving print quality.
  • Bed and Printing Temperatures: Both filaments require heated beds. ABS typically prints at 220-250°C, with a bed temperature of 90-110°C. ASA may need slightly higher temperatures.
  • Layer Adhesion: Optimal print settings are key for good layer adhesion. Calibrating the printer for the right extrusion temperature and speed is essential.

Ensuring Bed Adhesion

  • Surface Preparation: For both filaments, preparing the print bed with a glue stick can enhance adhesion. Clean the bed regularly to remove any residue.
  • Use of Rafts and Brims: Adding a raft or brim to your print can significantly improve bed adhesion, especially for larger prints.

Handling Environmental Factors

  • Temperature Resistance: Understand the limits of each filament. While ABS can withstand higher temperatures, ASA is more suited for environments with UV exposure.
  • Printing Environment: Ensure a well-ventilated area when printing with ABS due to fumes. ASA prints better in stable environments with minimal drafts.

Post-Processing Tips

  • Acetone Smoothing for ABS: ABS parts can be smoothed using an acetone vapor bath, giving a glossy and smooth finish.
  • Sanding and Painting: Both ASA and ABS can be sanded for a smoother surface. They also accept paint well, which is useful for aesthetic or functional purposes.

ASA or ABS: Embracing the Perfect Filament for Your 3D Printing Journey

In conclusion, when deciding between ASA and ABS, it’s crucial to consider your project’s specific requirements for durability, weather resistance, and printing environment. At Unique Prints, we recognize the importance of these factors and are dedicated to providing expert guidance in selecting the ideal filament for your 3D printing endeavors in Australia.

With our extensive experience and knowledge, we can assist you in making informed decisions that align with your unique needs. We encourage you to share your experiences, ask questions, and share your thoughts by reaching out to us. Additionally, take the opportunity to explore our wide range of Polylite ASA and ABS filaments, as they offer exceptional quality and performance for your next project.

By choosing the right filament and leveraging our expertise, you can elevate your 3D printing experience and achieve outstanding results. Let us be your trusted partner in fulfilling your creative vision.

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About the Author: Unique Prints Shop

When we bought our first off the shelf 3D Printer in 2019, like many others, it wasn’t without its shortfalls. While being a great machine to begin our 3D printing journey on, it required immediate fixes and several replacement parts to be its best. Then we discovered the Voron!… A do-it-yourself, source-it-yourself, spaceship of a printer designed by the team at Voron Design for the hobbyist and enthusiast. Learn More