Posted by SainSmart on

Written by Leslie

Welcome to the ever-expanding world of 3D printing, where your ideas can come to life in vibrant, three-dimensional forms. One crucial factor in this creative process is the filament you choose. Today, we're diving into ASA filament—a standout in the 3D printing community. But what makes ASA so special?

ASA (Acrylonitrile Styrene Acrylate) and ABS (Acrylonitrile Butadiene Styrene) are both durable thermoplastics popular in 3D printing. ASA is prized for its exceptional UV and weather resistance, making it ideal for outdoor applications. It maintains high impact strength and chemical resistance. ABS, known for its toughness and ease of use, is widely used in products like automotive parts and toys. However, it lacks ASA's UV stability, making it less suitable for prolonged outdoor exposure.

Learn more SainSmart ASA FIlament:Carbon Fiber ASA FilamentGT-3 High Speed ASA Filament


Why Choose ASA? The Key Advantages

What sets ASA apart? It's UV-resistant, durable, and versatile, making it perfect for outdoor projects. Whether it's under the blazing sun, pouring rain, or even in snowy conditions, ASA remains reliable and steadfast, making it an invaluable addition to your 3D printing toolkit.

Pros and Cons of ASA Filament

Let's weigh the benefits and drawbacks of ASA filament. On the plus side, ASA provides high impact resistance, superior UV and chemical resistance, and anti-static properties. It maintains its shape over time and is less prone to stringing compared to PLA. However, ASA can emit unpleasant odors during printing, so a well-ventilated workspace is necessary.


  • Excellent UV stability (ideal for outdoor use)
  • Tough and durable
  • High impact and temperature resistance
  • Excellent chemical and water resistance
  • Smooth finish
  • Soluble in acetone (useful for gluing and smoothing)
  • Compatible with soluble supports (like HIPS)


  • Requires higher extruder and bed temperatures
  • Prone to warping, cracking, and shrinking while printing
  • Emits potentially hazardous fumes
  • More expensive than some other filaments


ASA vs Other Filaments: How It Stacks Up

How does ASA compare to other popular filaments like PLA, ABS, Nylon, and Polycarbonate?

  • Versus PLA: ASA is more durable and weather-resistant.
  • Versus ABS: ASA has superior UV resistance.
  • Versus Nylon: While Nylon offers strength and flexibility, ASA excels in UV resistance.
  • Versus Polycarbonate: Polycarbonate is sturdy and reliable, but ASA's weatherproof features give it an edge.

Real-Life Applications of ASA

ASA filament has proven its worth in various applications:

  • Automotive Exterior Parts: ASA's durability and weather resistance make it ideal.


 Desk for Tesla Model Y / 3 Steering wheel by kingjamez

  • Outdoor Decorations: From garden ornaments to weather-resistant fixtures, ASA is a top choice.

Wind turbine by Jackmass

  • Assembly Jigs and Fixtures: ASA's strength is invaluable for these tools.

Cap extender by tomulinek

  • Custom Items: Personalized tool caddies and handle covers showcase ASA's versatility.

Starlink Dishy Pole / Pipe Mount Adapter by zaxxon21


Challenges of Printing with ASA

Printing with ASA can be tricky due to its sensitivity to temperature changes. However, it is generally easier to print with than ABS. The main challenges are warping and potentially hazardous fumes. Warping occurs when parts cool unevenly. To prevent this, avoid drafts, ensure good first-layer adhesion, keep your printer calibrated, and use brims or rafts.

Like most printing materials, ASA emits fumes during extrusion, which can be hazardous. If the smell is strong, consider lowering the printing temperature. Proper ventilation is essential, and using masks can provide additional protection.


Tips for Successful ASA Printing

To get the best results with ASA filament, follow these tips:

  • Start with a brim: This helps stabilize the base of your model. Print slowly, especially for the first layer, to ensure proper adhesion.
  • Monitor temperature settings: This prevents overheating and related issues.

Ensure your 3D printer meets these hardware requirements:

  1. Heated bed: Essential to prevent shrinking and cracking due to temperature differences.
  2. Build surface: Good bed adhesion is crucial. Use Kapton tape, ABS glue, or standard hairspray, and ensure your bed is leveled.
  3. Enclosed printer: Highly recommended for large parts to avoid drafts and warping.
  4. High-temperature hot end: Necessary to print at temperatures up to 260 °C. PTFE-lined hot ends may degrade at these temperatures.
  5. Filament storage: ASA is hygroscopic, so store it in a dry box to prevent moisture absorption and related issues.


Recommend products:

Reusable Respirator Mask Gas Protection

Carbon Fiber ASA Filament, 1.75mm Black, UV & Weather Resistant, Fit for Outdoor Functional Parts, 1kg, Accuracy +/- 0.04 mm

Carbon Fiber ASA Filament



The world of 3D printing offers a vast array of filament choices. The best material for your project depends on your needs, budget, and printing setup. ASA stands out for its durability and versatility, especially for outdoor applications. Ready to elevate your 3D printing projects with ASA? Give it a try and experience the benefits of this remarkable filament!

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