3D Printing Info

Filament comparison

ASA-GF vs TPU 95A

Compare printing settings, strength, heat resistance, dated prices and sources.

Glass-fibre ASA (ASA-GF) guideTPU 95A guide

2 selected · all documented properties

Open these two in the interactive comparisonMore ASA-GF comparisonsMore TPU 95A comparisons
ASA-GF vs TPU 95A — documented properties and sources
PropertyGlass-fibre ASA (ASA-GF)ASATPU 95AFLEX
Market snapshot
Listing priceUSD/kg; dated snapshots$29.95/kg median; $26.99–$33.99/kg across 3 dated product listings$39.99/kg median; $23.00–$106.05/kg across 15 dated product listings
Identity & Market
Base polymer / chemistryASA reinforced with chopped glass fibre — 10 wt% (Spectrum ASA-X GF10), 15 wt% (ZYLtech ASA-GF)[1][2]Thermoplastic polyurethane, polyester or polyether based, at about 92–95 Shore A[3][4]
Densityg/cm³1.07 (ZYLtech) and 1.11 (Spectrum), ISO 1183[1][2]1.20–1.25 (ISO 1183); Prusament 1.25, Polymaker 1.20–1.24, Bambu Lab 1.22[3][4][5]
Typical priceUSD/kg1 kg spools cluster near 28[6][7]1 kg spools cluster near 35; the specialist and industrial brands run to 106[8][9][5][10][11][12]
Price range across brandsUSD/kg27–34 across brands; Ambrosia 27, ZYLtech 30, Siraya Tech 34[6][7][13]23–106 across brands; IEMAI 3D 23, LANDU 24, Siraya Tech 25, PS Imports 25, PrimaCreator 32, Bambu Lab 35–42, Polymaker 40–50, add:north 72, Recreus 90, 3DXTech 96, NinjaTek Cheetah 106[9][14][8][15][10][11][16][17][18][12]
Market availability1–5Niche, a handful of specialist brands[6][1][2]Ubiquitous, every brand and retailer[8][15][9][14][10][11]
Spool sizes & diameters1.75 and 2.85 mm; 1 kg spools[2][6]1.75 and 2.85 mm; 0.5, 0.75 and 1 kg spools[8][15]
Typical applicationsOutdoor brackets and mounts that need stiffness and dimensional stability under sun and moisture[1][2]Gaskets, phone cases, tyres, vibration mounts and protective covers[19]
Diameter tolerance± mm±0.01 at 95 % probability and ±0.02 at 100 % (ZYLtech)[2]±0.06 (Prusament) — the loosest tolerance Prusa publishes, because soft filament deforms in the gauge[4]
Printing Parameters
Nozzle temperature°C240–270 (Spectrum); 240–280 (ZYLtech)[1][2]210–240; Polymaker 210–230, Prusament 230 ± 10, Bambu Lab HF 220–240[3][4][5]
Bed temperature°C80–100 (Spectrum); 90–110 on PEI (ZYLtech)[1][2]25–65; Prusament 65 ± 10, Bambu Lab 30–35, Polymaker 25–60[4][5][3]
Enclosure / chamber requirement1–5Enclosure recommended[20]Open frame is fine[3]
Part cooling fan0–20 % (Spectrum)[1]Fan on[3][5]
Bed surface & adhesion aidPEI sheet, BuildTak or an adhesion aid such as Magigoo (Polymaker); Simplify3D also lists Kapton tape and ASA slurry[21][22]PEI sheet or painter's tape; Polymaker warns TPU can over-stick and advises a glue stick as a release agent[23][19]
Maximum volumetric flow (mm³/s; see test conditions)mm³/s2.4–5.6 at Spectrum's 30–70 mm/s on a 0.4 mm nozzle at 0.2 mm layer; ZYLtech allows up to 200 mm/s[1][2][24]2.4 at Polymaker's 30–50 mm/s and 2.4 at Prusa's 30 mm/s cap on a 0.4 mm nozzle at 0.2 mm layer; Bambu Lab's high-flow grade lifts the cap to 200 mm/s (16 mm³/s)[3][4][5]
Warping tendency1–5Moderate — needs adhesion aid or draught shield[20]None[3]
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[21]Sticks to most surfaces[3]
Stringing / oozing tendency1–5Slight — Polymaker advises 1–2 mm retraction at 20–30 mm/s[21]Moderate — retraction tuning needed; Polymaker specifies 3–6 mm retraction, well above the 1–3 mm used for rigid filaments[3]
Overall printing difficulty1–5Intermediate — dry filament and a tuned profile; ZYLtech requires a hardened nozzle of 0.6 mm or larger[2][1]Intermediate — dry filament and a tuned profile; the speed ceiling is the main constraint[3][4]
Extruder requirementZYLtech specifies a hardened nozzle 0.6 mm or larger; Spectrum bases its settings on a 0.5 mm nozzle[2][1]Direct drive strongly preferred. BASF rates its 95A grade as running on both direct-drive and Bowden machines, but every maker caps speed at 15–50 mm/s unless the grade is specifically high-flow[25][3][4]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required — Spectrum recommends ruby or hardened, ZYLtech requires hardened[1][2]Brass fine indefinitely[26]
Abrasiveness1–5Highly abrasive — standard GF composite[1][2]Non-abrasive[26]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[27]Moderate — needs dry filament and a clean nozzle[28]
Heat-creep / jam sensitivity1–5Slightly sensitive[22]High — all-metal hotend and strong cooling needed; soft filament buckles in the cold zone if it slows[19]
Hotend requirementNo special hotend required[22]No special hot-end required, but a direct-drive extruder is (Simplify3D)[23]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Moderate — the ASA matrix takes up 0.40–0.45 % saturated at 25 °C / 55 % RH; no glass-filled grade publishes its own figure[29][30][31]Low (0.1–0.3 %) by Prusa's measurement at 0.04 % in 7 days, but Polymaker measures 0.82 % equilibrium and groups TPU with the highly hygroscopic materials[4][3][28]
Equilibrium moisture content at ~50 % RH%Not documented0.82 equilibrium (Polymaker); 0.02 after 24 h and 0.04 after 7 days at 22 % RH (Prusa)[3][4]
Drying temperature & timeNot documented70 °C for 8 h (Polymaker); 70 °C for 8 h or an 80–90 °C heatbed for 12 h (Bambu Lab)[3][5]
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[28]Bubbling and popping at the nozzle, stringing, rough surface and weak layers[28]
Effect of moisture on strengthNo dry-versus-conditioned figures are published; Polymaker groups the styrenics as moderate-sensitivity and absorbed water shows as bubbling and poor layer adhesion[28]Polymaker groups TPU with nylon, PVA and PETG as highly hygroscopic and says these often need to stay in a dryer while printing; no dry-versus-conditioned figures are published[28]
Storage requirementSealed with desiccant; Polymaker rates the styrenics moderate-sensitivity[28]Sealed with desiccant; often kept in a dryer during the print[28]
Mechanical Properties
Tensile strength (XY)MPa33–36 at break, ISO 527 (ZYLtech; specimen type not stated); Spectrum quotes 55 at break on injection-moulded specimens[2][1]41.4 ± 1.3 printed (Prusament, ISO 37); NinjaTek Cheetah 39 ultimate (ASTM D638)[4][32]
Young's modulusMPa2540–2890 (ZYLtech; specimen type not stated) and 2550 (Spectrum, injection-moulded), ISO 527[2][1]Not documented
Elongation at break%3.4 at break (ZYLtech; specimen type not stated); Spectrum quotes 2.80 at yield on injection-moulded specimens[2][1]551 ± 24 printed (Polymaker, ISO 37); the filament itself stretches 7264 % before break (Prusa, ISO 527)[3][4]
Flexural modulusMPa2130–2480 flexural modulus, ISO 178 (ZYLtech; specimen type not stated)[2]Not documented
Charpy impact, notchedkJ/m²8.3 notched Charpy at 23 °C on injection-moulded specimens (Spectrum, ISO 179-1eA); ZYLtech publishes notched Izod 6.9 by ISO 180 instead[1][2]Not documented
Other impact dataCharpy unnotched 25 kJ/m² at 23 °C on injection-moulded specimens (Spectrum, ISO 179-1eU); ZYLtech notched Izod 6.9 kJ/m² (ISO 180)[1][2]Not documented
Layer adhesion / Z tensileMPaNot documented9.5 ± 0.2 (Prusament interlayer adhesion, ISO 527)[4]
Brittleness1–5Brittle — snaps with little warning; elongation at break 3.4 %[2]Very ductile — bends far before failing[3][4]
Hardness (scale-specific)Shore A / Shore D / RockwellNot documented92 ± 0.4 Shore A and 39 ± 0.7 Shore D (Prusament); 95A (Polymaker, ISO 7619-1); 91 Shore A / 40 Shore D (Fiberlogy FiberFlex 40D, ISO 7619); 95A (NinjaTek Cheetah, ASTM D2240); 94.5 A measured on a printed Bambu Lab 95A part and 96.2 A on a Qidi one (My Tech Fun)[4][3][33][32][34]
Creep resistance / sustained load1–5Good — no creep test found; chopped glass fibre lifts modulus to 2540–2890 against 2379–2450 for unfilled ASA[2][30][29]Poor — deforms under load at room temperature; a loaded bar crept from 74.5 to 82.7 mm over 5 days[34]
Fatigue / repeated-flex resistance1–5Below average — no GF-grade S-N curve; elongation at break falls to 3.4 % against 6.7–9.2 % for unfilled ASA[2][30][29]Excellent — living hinges viable[19]
Elasticity / flexibility1–5Rigid[2]Rubbery / highly elastic[3][4]
Wear resistance & frictionNot documentedAbrasion resistance is a headline property; BASF measures 64 mm³ loss by ISO 4649 on its 92A grade[25]
Thermal Properties
HDT at 0.45 MPa°C100 (Spectrum, injection-moulded, ISO 75 at 0.45 MPa)[1]Not documented
HDT at 1.8 MPa°C97–99 unannealed (ZYLtech, ISO 75 at 1.8 MPa; specimen type not stated); Spectrum 90 on injection-moulded specimens[2][1]Not documented
Melting point / Vicat°CAmorphous ASA matrix; Vicat 98 (Spectrum, ISO 306). ZYLtech quotes a 210–220 °C melting range by ISO 11357 for its grade[1][2]144 melting (BASF 95A, ISO 11357-3); Bambu Lab 183, Polymaker's modulus at 100 % elongation 8.9 MPa[25][5]
Continuous service temperature°C93 — Prusa publishes this as the temperature resistance of Prusament ASA[35]Bounded by a melting point of 144–183 °C; no loaded-bar service figure is published for TPU[25][5]
Flammability / UL 94Flammable; no UL 94 rating published[29]Flammable; no UL 94 rating published for the grades surveyed[3]
Environment & Chemical
UV resistance1–5Excellent — designed for permanent outdoor use; Spectrum states the parts resist prolonged UV and moisture exposure[1][36]Good — years with some colour shift; Polymaker lists UV exposure among the conditions TPU withstands[19]
Chemical resistanceGood against weak acids, weak alkalis, oils and grease; dissolved by acetone[30]Good resistance to oils and common solvents (BASF)[25]
Food contactNot food safe[21]Not food safe without specific certification (Polymaker)[19]
Biodegradability / compostabilityNot biodegradable[21]Not biodegradable[19]
RecyclabilityNot accepted in household plastic collection[21]Not accepted in household plastic collection[19]
Health & Safety
Fume toxicity1–5High — hazardous VOC such as styrene; enclosure and filtration needed[37][20]Low hazard — minimal VOC and particle emission; TPU was not among the nine filaments in the chamber study[37]
Hazardous species emittedStyrene. Bambu Lab states ABS and ASA release harmful gases such as styrene at printing temperature, which can be toxic and cause dizziness or nausea. Azimi et al. measured styrene from every styrenic filament tested but did not test ASA itself[20][37]Not documented
Ventilation / filtration requirement1–5Enclosure with carbon and HEPA filtration[37][20]Open a window / occasional ventilation[37]
Dust & fibre handling hazardGlass fibre is bound in the matrix; avoid inhaling sanding dust[1]Not documented
Post-Processing
Sanding & machiningSands well and takes filler before painting[21]Sanding is impractical — the surface tears rather than abrades[19]
Painting & finishingPaints readily; ASA holds colour outdoors so many parts are left unpainted[21]Not documented
Gluing & solvent weldingSolvent-welds with acetone[30]Cyanoacrylate bonds TPU; no common solvent welds it[19]
Vapour / chemical smoothingAcetone vapour smoothing works[30]No practical vapour smoothing[19]
Support material pairingHIPS breaks away or dissolves in d-limonene; Bambu Lab sells a Support for ABS that also serves ASA[20]Polymaker warns TPU supports are often very difficult to remove; PolyDissolve S1 is rated for TPU[19]
Dimensional accuracy & detailNot documentedStringing and elephant-foot are the accuracy limits; retraction has to be long and slow[3]
Solvents & Solubility
Soluble inAcetone dissolves the resin and leaves the fibre; MEK, THF, ethyl acetate and chlorinated solvents attack the styrenic backbone.[38][30]DMF, DMSO, NMP and THF dissolve TPU; acetone, MEK and cyclohexanone are partial solvents. All laboratory reagents.[39]
Softened or crazed byLimonene attacks some grades — Prusa reports Prusament ASA Orange flaking apart as layer adhesion fails.[40]Toluene and benzene swell it up to +50 % by weight at 23 °C; esters swell it severely; ethanol and IPA soften it.[39]
Solvent welding & smoothing agentAcetone vapour reaches only the resin fraction, so the fibre is left standing proud of the smoothed surface.[41][30]None practical — the true solvents (DMF, THF, NMP) are laboratory reagents and leave the joint swollen and weak.[39]

Material entries describe families or representative grades, not an interchangeable specification for every spool. Test methods, orientations and conditions may differ. Unknown values are marked “Not documented”. Prices and source dates remain historical snapshots; check the linked guide for product details. Differences highlight text, not a universal winner.

Sources for this comparison

  1. Spectrum ASA-X GF10 Technical Data Sheet (mechanical and thermal data marked injection-moulded) Spectrum Filaments · 2026-08 · tds
  2. ZYLtech ASA-GF Filament Technical Data Sheet v1 ZYLtech · 2026-08 · tds
  3. PolyFlex TPU95 Technical Data Sheet V5.4 Polymaker · 2024-11 · tds
  4. Prusament TPU 95A Technical Datasheet v1.0 Prusa Polymers · 2025-05 · tds
  5. Bambu Filament Technical Data Sheet — TPU 95A HF Bambu Lab · 2026-08 · tds
  6. Filastruder product catalogue Filastruder · 2026-08 · vendor
  7. ZYLtech ASA-GF Glass Fiber filament — product page ZYLtech · 2026-08 · vendor
  8. Polymaker product catalogue Polymaker · 2026-08 · vendor
  9. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  10. LANDU TPU 3D Printer Filament 1.75 mm 95A Black 1 kg — Amazon listing Amazon.com · 2026-08 · vendor
  11. IEMAI 3D TPU 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  12. Cheetah product page — print guidelines, spool sizes and price NinjaTek · 2026-08 · vendor
  13. Siraya Tech Fibreheart ASA-GF Filament product page Siraya Tech · 2026-08 · vendor
  14. TPU for AMS — product page Bambu Lab US Store · 2026-08 · vendor
  15. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  16. Siraya Tech Flex TPU 95A Filament — product page Siraya Tech · 2026-08 · vendor
  17. PrimaCreator EasyPrint FLEX TPU 95A product page PrimaCreator · 2026-08 · vendor
  18. add:north TPU Pro Matte 95A product page add:north · 2026-08 · vendor
  19. TPU — material basics Polymaker Wiki · 2026-08 · doc
  20. ABS / ASA / PC Usage Guide Bambu Lab Wiki · 2026-08 · doc
  21. ASA — material basics Polymaker Wiki · 2026-08 · doc
  22. ASA — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  23. Flexible (TPE/TPU) — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  24. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  25. Ultrafuse TPU 95A Technical Data Sheet (Version 2.0) BASF Forward AM · 2022-08 · tds
  26. Extrudr Product Catalogue (DURAPRO PA12 data block) Extrudr · 2025-03 · tds
  27. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  28. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  29. Bambu Filament Technical Data Sheet V3.0 — ASA Bambu Lab · 2026-08 · tds
  30. PolyLite ASA Technical Data Sheet Polymaker · 2024-11 · tds
  31. Prusament ASA Technical Datasheet v1.1 Prusa Polymers · 2024-05 · tds
  32. NinjaTek technical specs comparison chart (Cheetah, NinjaFlex, Armadillo, Alloy 910, Nylon 645) NinjaTek · 2026-08 · tds
  33. FiberFlex 40D Technical Data Sheet Fiberlogy · 2026-08 · tds
  34. BambuLab TPU 95A HF vs Qidi TPU 95A HF — results spreadsheet My Tech Fun (Igor Gaspar) · 2024-02 · test
  35. Prusament ASA — material page Prusa Polymers · 2026-08 · doc
  36. ASA — FDM Material Data Sheet (includes 1000 h QUV exposure results) Stratasys · 2026-08 · tds
  37. Emissions of Ultrafine Particles and Volatile Organic Compounds from Commercially Available Desktop Three-Dimensional Printers with Multiple Filaments (Azimi et al.) Environmental Science & Technology 50(3) 1260-1268 · 2016-01 · paper
  38. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds
  39. Elastollan — Chemical properties: swelling and chemical resistance BASF · 2026-08 · tds
  40. HIPS — Knowledge Base Prusa Research · 2026-08 · doc
  41. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc