Flex vs ASA
Compare Flex and ASA filaments side-by-side. See which one is best for your 3D printing project.
Flex
-Versatile 3D printing filament
ASA
AAcrylonitrile Styrene Acrylate
Excellent UV resistance (outdoors indefinitely), tough, matte surface
Detailed Comparison
Property
Flex
ASA
Tier Rating
Tier null
Tier A
Family
Flexible
ASA
Nozzle Temp
220-260°C
220-275°C
Bed Temp
40-85°C
90-110°C
Enclosure
not needed
recommended
Cooling
Low to moderate; avoid drafts
Moisture Sensitivity
low
moderate
Strengths Comparison
Flex Strengths
ASA Strengths
- Excellent UV resistance (outdoors indefinitely), tough, matte surface
- Less warping than ABS; low viscosity enables very high speed printing
- High heat tolerance (~boiling water range)
Considerations
Flex Caveats
ASA Caveats
- Still off-gasses; enclosure/ventilation recommended
- Can still warp; needs tuning
Frequently Asked Questions
Is Flex or ASA better for 3D printing?
ASA is generally rated higher (Tier A) compared to Flex (Tier null). However, the best choice depends on your specific needs: Flex is best for various applications, while ASA is best for Excellent UV resistance (outdoors indefinitely), tough, matte surface.
What are the temperature differences between Flex and ASA?
Flex prints at 220-260°C nozzle / 40-85°C bed. ASA prints at 220-275°C nozzle / 90-110°C bed.
Do Flex and ASA need an enclosure?
Flex: not needed. ASA: recommended.
Which is more beginner-friendly: Flex or ASA?
Flex is more beginner-friendly as it doesn't require an enclosure.