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Prusament ASA

Ref.: PRUSA-ASA-SAPPHIRE-175-800G

27.26 €

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The ASA (Acrylonitrile Styrene Acrylate) filament from Prusa Research has become one of the best options for 3D printing in industrial and functional applications. Known for its UV resistance, long-term durability, and ability to withstand high temperatures, this material is considered the natural successor to ABS.

Thanks to its excellent outdoor performance, ASA is ideal for manufacturing parts exposed to harsh weather conditions. Additionally, its low shrinkage during printing and reduced fume emissions make it a practical and safe solution for demanding work environments.

Bike bottle holders printed with Prusament ASA filament

Photo 1: Bike bottle holders printed with Prusament ASA filament. Source: Prusa3D

Photo 2:Thanks to its high-temperature resistance up to 93°C, ASA is an excellent choice for heat-stressed parts. Source: Prusa3D

Applications of ASA filament in 3D printing

ASA is widely used in components subjected to thermal or mechanical stress, such as outer casings, technical supports, bicycle bottle holders, or protective covers. It is also the ideal choice for outdoor projects where sun exposure and extreme environmental conditions are critical.

Due to its versatility, strength, and aesthetics, ASA has become one of the most valued technical materials in FDM 3D printing.

Advantages and disadvantages of ASA filament

The following table outlines the main benefits and limitations of ASA filament, based on its technical use and printing behavior:

Advantages of ASA	Disadvantages of ASA
✅ High UV resistance, ideal for prolonged outdoor use	❌ Tendency to warp in large prints
✅ Withstands temperatures up to 93 °C without deforming	❌ Odor emissions during printing (lower than ABS)
✅ Precise prints without stringing	❌ Contains styrene, proper ventilation recommended
✅ Compatible with acetone vapor smoothing	❌ Requires high printing temperatures
✅ Easy to sand, glue, and post-process	❌ Hygroscopic: must be stored in a dry place
✅ High wear and impact resistance
✅ Good layer adhesion
✅ Recyclable and more durable than other common materials

Photo 3: ASA is soluble in acetone, so it can be used to bond printed parts. Source: Prusa3D

Photo 4:ASA filament can be smoothed with acetone vapors. Source: Prusa3D

Photo 5: ASA filament can be smoothed with acetone vapors. Source: Prusa3D

Technical characteristics of ASA filament

These are the key technical specifications that define the performance of ASA in 3D printing. Understanding these parameters is essential to optimize results in functional and technical projects:

Property	Value / Description
Printing difficulty	Medium
Thermal resistance	Up to 93 °C
Mechanical strength	High
Warping susceptibility	High (manageable with enclosed chamber)
Odor emission	Yes (less intense than ABS)
Post-processing	Easy (sanding, gluing, acetone smoothing)
Solubility	Soluble in acetone
Elasticity	Medium
Printing speed	High (from 0.10 mm)
Abrasiveness	None
Impact resistance	High
Breakability	Difficult to break

Photo 6: The hardness of ASA filament makes it ideal for frequently used parts, exposed to impacts and drops. Source: Prusa3D

Photo 7: Parts printed with ASA filament and polished with acetone. Source: Prusa3D

Why print with ASA filament

ASA filament stands out for its thermal resistance of up to 93 °C, making it suitable for printing parts subjected to thermal or mechanical stress. Its dimensional stability ensures high-quality prints without significant deformation. Moreover, its compatibility with acetone enables smooth and aesthetic surfaces, perfect for prototypes and visible parts.

Although it may require higher printing temperatures and a controlled environment to avoid warping in large models, ASA remains a reliable, versatile, and professional-grade material in modern 3D printing.

Video 1: A user compares PLA, PETG, and ASA filaments.

General information
Format	800 g \| 25 g
Density	(ISO 1183) 1.07 g/cm³
Filament diameter	1.75 mm
Filament tolerance	0.04 mm
Filament length	800 g = 310.8 m\| 25 g = 9.7 m

Printing properties
Printing temperature	260 ºC
Print bed temperature	110 ºC
Cooling fan	30 mm/s
Recommended printing speed	Up to 200 mm/s

Mechanical properties
Charpy impact strength	(ISO 179-1) 25 KJ/m²
Tensile modulus	(ISO 527-1) 16000 MPa
Flexural strength	(ISO 178) 64 MPa
Flexural modulus	(ISO 178) 64 MPa
Surface hardness	(Prusa Polymers Shore D) 78

To achieve the best results when working with ASA filament in 3D printing, it is essential to follow certain recommendations that help minimize issues such as warping and ensure optimal adhesion and surface quality. Below are practical tips for printing ASA efficiently and safely:

1. Thermal stability from the base: ASA requires a bed temperature of 110 ± 5 °C. This temperature is essential to ensure proper adhesion during the first layers and to prevent the part from detaching during printing. It is recommended to use surfaces such as PEI sheets or glass plates treated with suitable adhesives.

2. Environment control to avoid warping: Although ASA has less shrinkage than ABS, it can still deform, especially on large parts. To reduce the risk of warping, it is recommended to print in a closed enclosure that maintains a stable temperature and avoids drafts. Additionally, adding a tall skirt around the model can help retain heat at the base and improve adhesion.

3. Extruder temperature: For proper extrusion of ASA, it is recommended to set the extruder to 260 ± 5 °C. A specialized hotend is not required, but it is important to ensure that the extruder can reach and maintain this temperature stably.

4. Controlled cooling: Unlike other materials, ASA prints better with partial cooling. A part cooling fan running at 30 % is usually enough to ensure proper cooling without affecting interlayer adhesion. Excessive cooling may cause warping or poorly bonded layers.

5. Material preparation: ASA is a hygroscopic material, so it should be stored in a dry environment or used with drying systems if it has been exposed to moisture. Moist filament can cause bubbles, surface defects, and weak layers.

6. Safety during printing: Although ASA emits fewer fumes than ABS, it is recommended to print in well-ventilated areas or with active filtering systems, especially for long prints.

By following these recommendations, ASA filament can deliver professional results with high mechanical strength, UV stability, and excellent outdoor performance.