SUNLU ASA is a technical filament for 3D printing that excels in resistance to UV radiation, rain and higher temperatures – ideal for outdoor use and functional parts. It offers high strength, dimensional stability, excellent layer adhesion and a precise diameter of ±0.02 mm for reliable and smooth extrusion.

Durability for outdoor 3D printing
ASA is an excellent choice for parts exposed to sunlight and weather. It features high resistance to UV radiation, rain and temperature fluctuations, so prints retain their color over the long term and do not fade or deform.

Precise diameter and smooth unwinding
Thanks to a diameter tolerance of ±0.02 mm, the filament provides stable extrusion and consistent print quality. The spool supports smooth unwinding of the material for reliable operation during long prints.

Even winding for stable printing
The filament is evenly and neatly wound, helping to reduce the risk of tangling and contributing to smooth feeding into the printer. The result is a more stable process and cleaner prints.
SUNLU ASA filament (acrylonitrile styrene acrylate) is designed for projects where standard materials are not sufficient. Thanks to its combination of mechanical strength and resistance to weathering, prints retain their color, shape and functional properties over the long term – even when exposed to sunlight, moisture or temperature fluctuations.
The material is optimized for stable printing and professional results. Precise diameter tolerances support a uniform material flow and a clean surface without unnecessary fluctuations in extrusion.
Main advantages of ASA filament:
- Outdoor durability – high resistance to UV radiation, rain and temperatures
- Resistance to thermal deformation – up to 96 °C
- Tensile strength of 50 MPa and impact resistance of 18 kJ/m²
- Wide printing range – speed of 50–200 mm/s and recommended temperatures for flexible use
Specifications
- Manufacturer
- Sunlu
- Material
- ASA (acrylonitrile styrene acrylate)
- Color
- Green
- Filament diameter
- 1.75 mm (±0.02 mm)
- Density
- 1.05 g/cm³
- Printing temperature
- 250–260 °C (50–100 mm/s) / 260–280 °C (100–200 mm/s)
- Build plate temperature
- 80–100 °C
- Print speed
- 50–200 mm/s
- Curing temperature
- 80 °C
- Storage humidity
- < 20% RH (in a sealed container with desiccant)
- Vicat softening temperature
- 105 °C
- Heat deflection temperature
- 96 °C
- Melting temperature
- 120 °C
- Melt flow index (MFI)
- 15.5 g/10 min
- Tensile strength
- 50 MPa
- Flexural strength
- 73 MPa
- Flexural modulus
- 2144 MPa
- Elongation at break
- 20%
- Impact resistance
- 18 kJ/m²
- Weather resistance
- high resistance to UV radiation, rain and temperatures