3D Printing Info

Filament comparison

ASA Aero vs PETG-GF

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

Foaming ASA (ASA Aero) guideGlass-fibre polyester (PETG-GF / PET-GF) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore ASA Aero comparisonsMore PETG-GF comparisons
ASA Aero vs PETG-GF — documented properties and sources
PropertyFoaming ASA (ASA Aero)ASAGlass-fibre polyester (PETG-GF / PET-GF)PETG
Market snapshot
Listing priceUSD/kg; dated snapshots$49.99/kg median; $49.99–$49.99/kg across 1 dated product listings$27.38/kg median; $18.99–$29.99/kg across 3 dated product listings
Identity & Market
Base polymer / chemistryASA with a heat-activated blowing agent that expands at the nozzle[1][2]Glass-fibre reinforced polyester. Polymaker's Fiberon PET-GF15 uses a PET rather than a PETG matrix and carries 15 wt% glass fibre[3]
Densityg/cm³0.99 filament (Bambu Lab, ISO 1183); Formfutura's grade reaches 0.33 g/cm³ fully expanded[1][2]1.43 (Fiberon PET-GF15, ISO 1183)[3]
Typical priceUSD/kg1 kg spools cluster near 50[4]1 kg spools cluster near 25[5][6]
Price range across brandsUSD/kg50 at Bambu Lab's 1 kg listing[4]19–30 across brands; ELEGOO 19, Polymaker Fiberon 30[5][6]
Market availability1–5Niche, a handful of specialist brands[4][2]Niche, a handful of specialist brands[5][6]
Spool sizes & diameters1.75 mm; 1 kg spools[4]1.75 mm; 0.5 and 1 kg spools[6]
Typical applicationsDrone airframes, RC parts and floating or outdoor applications where mass matters and UV exposure rules out LW-PLA[2]Stiff, dimensionally stable fixtures; the Fiberon grade is designed to be annealed for heat resistance[3]
Printing Parameters
Nozzle temperature°C240–280 (Bambu Lab); 220–285 (Formfutura), with foaming activating near 230 °C and peaking between 270 and 285 °C[1][2]Not documented
Bed temperature°C80–90 (Bambu Lab); 50–90 (Formfutura)[1][2]Not documented
Enclosure / chamber requirement1–5Enclosure recommended — Bambu Lab specifies a 45–60 °C chamber[1][7]Not documented
Recommended chamber temperature°C45–60 (Bambu Lab)[1]Not documented
Part cooling fan0–80 % (Bambu Lab); 0–50 % (Formfutura)[1][2]Not documented
Bed surface & adhesion aidPEI sheet, BuildTak or an adhesion aid such as Magigoo (Polymaker); Simplify3D also lists Kapton tape and ASA slurry[8][9]Textured PEI, satin or powder-coated sheets; on smooth PEI a glue stick acts as a release agent[10][11]
Maximum volumetric flow (mm³/s; see test conditions)mm³/s12 at Bambu Lab's 150 mm/s cap on a 0.4 mm nozzle at 0.2 mm layer[1][12]Not documented
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[8]Needs the right surface or a thin adhesive — the problem is releasing the part, not sticking it[10][11]
Stringing / oozing tendency1–5Slight — Polymaker advises 1–2 mm retraction at 20–30 mm/s[8]Moderate — retraction tuning needed; Polymaker names stringing as PETG's common quirk[11]
Overall printing difficulty1–5Advanced — enclosure, hardware upgrades, tuning; flow has to be cut to match the expansion and the density follows nozzle temperature[2][1]Not documented
Hardware Wear & Reliability
Nozzle hardness required1–4Brass fine indefinitely[7]Hardened steel required[3]
Abrasiveness1–5Non-abrasive[7]Highly abrasive — standard GF composite[3]
Nozzle clog risk1–5Not documentedModerate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[13]
Heat-creep / jam sensitivity1–5Slightly sensitive[9]Slightly sensitive[14]
Hotend requirementNo special hotend required[9]No special hot-end required[14]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5High — 0.80 % saturated at 25 °C / 55 % RH, nearly double unfilled Bambu Lab ASA[1][15]Moderate (0.3–0.8 %) — the PETG matrix reaches 0.40 % saturated at 25 °C / 55 % RH; no glass-filled grade publishes its own figure[10]
Equilibrium moisture content at ~50 % RH%0.80 saturated at 25 °C / 55 % RH (Bambu Lab)[1]Not documented
Drying temperature & time80 °C for 8 h (Bambu Lab)[1]Not documented
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[16]Bubbling and popping at the nozzle, stringing and a rough surface[16]
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[16]Polymaker groups PETG with nylon, PVA and TPU as highly hygroscopic; no dry-versus-conditioned strength figures are published for this grade and the loss shows as bubbling and poor layer adhesion[16]
Storage requirementSealed with desiccant; Polymaker rates the styrenics moderate-sensitivity[16]Sealed with desiccant; Polymaker groups PETG with the highly hygroscopic materials[16][11]
Mechanical Properties
Tensile strength (XY)MPa32 ± 4 printed XY, ISO 527 (Bambu Lab)[1]59.9 ± 0.8 printed XY, ISO 527 (Fiberon PET-GF15)[3]
Young's modulusMPa2010 ± 260 printed XY, ISO 527 (Bambu Lab)[1]4144 ± 133 printed XY, ISO 527 (Fiberon PET-GF15)[3]
Elongation at break%5.1 ± 1.6 printed XY, ISO 527 (Bambu Lab)[1]4.0 ± 0.5 printed XY, ISO 527 (Fiberon PET-GF15)[3]
Flexural strengthMPa58 ± 6 printed XY, ISO 178 (Bambu Lab)[1]104.2 ± 2.4 printed XY, ISO 178 (Fiberon PET-GF15)[3]
Flexural modulusMPa1510 ± 120 printed XY, ISO 178 (Bambu Lab)[1]3705 ± 85 printed XY, ISO 178 (Fiberon PET-GF15)[3]
Charpy impact, notchedkJ/m²8.2 ± 1.6 printed XY, ISO 179, notched (Bambu Lab)[1]8.7 ± 0.6 printed XY, ISO 179, notched (Fiberon PET-GF15)[3]
Other impact dataCharpy unnotched 32.0 ± 2.5 printed XY (Bambu Lab, ISO 179)[1]Charpy unnotched 27.2 ± 2.0 printed XY (Fiberon PET-GF15, ISO 179)[3]
Layer adhesion / Z tensileMPa21 ± 4 printed Z, ISO 527 (Bambu Lab); flexural Z falls to 24 against 58 in XY[1]48.2 ± 0.3 printed Z, ISO 527 (Fiberon PET-GF15)[3]
Brittleness1–5Moderate[1]Brittle — snaps with little warning; elongation 4.0 % in XY and 2.6 % in Z[3]
Creep resistance / sustained load1–5Below average — no creep test found; the foamed structure drops modulus to 2010 MPa and load is carried by a lower solid fraction[1][15]Below average — no GF-grade creep test; the CF grades sagged to 14.8–16.7 mm over 5 days at 1.25 kg against 17.1–20.4 mm unfilled[17][18][19]
Fatigue / repeated-flex resistance1–5Moderate — no foamed-grade S-N curve; unfilled printed ASA holds a fatigue limit at 25 % of tensile strength[1][20]Below average — no GF-grade S-N curve; elongation at break falls to 4.0 % in XY against 5.2–9.3 % unfilled[3][21]
Elasticity / flexibility1–5Rigid[1]Rigid[3]
Z strength as % of XY%66 by tensile, 41 by flexural (printed, Bambu Lab)[1]80 (Fiberon PET-GF15, printed Z against XY tensile)[3]
Thermal Properties
HDT at 0.45 MPa°C85 (ISO 75, 0.45 MPa, Bambu Lab) against 100 for unfilled Bambu Lab ASA[1][15]81.6 as printed, 133.7 after annealing (ISO 75, 0.45 MPa)[3]
HDT at 1.8 MPa°C78 (ISO 75, 1.8 MPa, Bambu Lab) against 92 for unfilled Bambu Lab ASA[1][15]71.8 as printed, 87.3 after annealing (ISO 75, 1.8 MPa)[3]
Glass transition (Tg)°CNot documented59.5 (DSC)[3]
Melting point / Vicat°CNot documented231.6 melting (DSC); Vicat 232.6 (ISO 306)[3]
Continuous service temperature°C93 — Prusa publishes this as the temperature resistance of Prusament ASA[22]Not documented
Annealing responseNot documentedAnnealing lifts HDT at 0.45 MPa from 81.6 to 133.7 °C[3]
Thermal expansion (CTE)µm/m·KNot documented20 along the print bead and 63–74 in the build direction at 30 °C (30 wt% GF, large-format printed, TMA)[23]
Flammability / UL 94Flammable; no UL 94 rating published[15]UL 94 HB at 1.5 mm (Fiberon PET-GF15)[3]
Environment & Chemical
UV resistance1–5Excellent — designed for permanent outdoor use; Formfutura states the foaming grade retains ApolloX's UV resistance[2][24]Not documented
Chemical resistanceGood against weak acids, weak alkalis, oils and grease; dissolved by acetone[25]Withstands acids, alkalis, oils and UV exposure[11]
Food contactNot food safe[8]Not certified for food contact as filament[11]
Biodegradability / compostabilityNot biodegradable[8]Not biodegradable[11]
RecyclabilityNot accepted in household plastic collection[8]Not accepted in household plastic collection[11]
Electrical & ESD propertiesNot documentedSurface resistivity above 10¹² ohm — insulating (Fiberon PET-GF15, ANSI/ESD S11.11)[3]
Health & Safety
Fume toxicity1–5High — hazardous VOC such as styrene; enclosure and filtration needed[26][7]Moderate — measurable VOCs and UFPs, ventilation advised[26]
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[7][26]Not documented
Ventilation / filtration requirement1–5Enclosure with carbon and HEPA filtration[26][7]Open a window / occasional ventilation[26]
Dust & fibre handling hazardNot documentedGlass fibre is bound in the matrix; avoid inhaling sanding dust[3]
Post-Processing
Sanding & machiningSands well and takes filler before painting[8]Sands poorly — the material is tough and gums rather than powders[14]
Painting & finishingPaints readily; ASA holds colour outdoors so many parts are left unpainted[8]Not documented
Gluing & solvent weldingSolvent-welds with acetone[25]Cyanoacrylate; no common solvent welds PETG cleanly[14]
Vapour / chemical smoothingAcetone vapour smoothing works[25]No practical vapour smoothing[14]
Support material pairingHIPS breaks away or dissolves in d-limonene; Bambu Lab sells a Support for ABS that also serves ASA[7]Prints its own supports; Polymaker rates PolyDissolve S1 for PETG[14]
Dimensional accuracy & detailMatte, textured surface that hides layer lines; colour lightens as the foaming degree rises, which doubles as a visual density cue[2]Not documented
Solvents & Solubility
Soluble inAcetone dissolves it (Polymaker); MEK, THF, ethyl acetate and the chlorinated solvents dissolve the styrenic backbone.[27][25]No common workshop solvent; dichloromethane — a carcinogen — dissolves the matrix surface, 1,2-dichloroethane destroys it in a week.[28][29]
Softened or crazed byLimonene attacks some grades — Prusa reports Prusament ASA Orange flaking apart as layer adhesion fails.[30]Acetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[28]
Solvent welding & smoothing agentAcetone vapour, ~20 min at 80 °C over 5 mm of liquid; the foamed wall absorbs solvent, so cut the exposure well short.[29]Dichloromethane reaches only the resin, so the fibre is left standing proud of the surface. Controlled carcinogen.[29]

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. Bambu Filament Technical Data Sheet V1.0 — ASA Aero Bambu Lab · 2026-08 · tds
  2. ApolloX Foaming Technical Data Sheet Formfutura · 2025-07 · tds
  3. Fiberon PET-GF15 Technical Data Sheet V1.0 Polymaker · 2026-08 · tds
  4. ASA Aero — product page Bambu Lab US Store · 2026-08 · vendor
  5. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  6. Polymaker product catalogue Polymaker · 2026-08 · vendor
  7. ABS / ASA / PC Usage Guide Bambu Lab Wiki · 2026-08 · doc
  8. ASA — material basics Polymaker Wiki · 2026-08 · doc
  9. ASA — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  10. Prusament PETG Technical Datasheet v1.1 Prusa Polymers · 2022-02 · tds
  11. PETG — material basics Polymaker Wiki · 2026-08 · doc
  12. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  13. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  14. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  15. Bambu Filament Technical Data Sheet V3.0 — ASA Bambu Lab · 2026-08 · tds
  16. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  17. Extrudr PETG vs PCTG vs XPETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  18. Prusament PETG-CF vs PETG V0 vs PETG — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  19. BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  20. Mechanical, Fatigue, and Thermal Characterization of ASA, Nylon 12, PC and PC-ABS Manufactured by Fused Filament Fabrication (FFF) Polymers 18(2):302 · 2026-01 · paper
  21. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  22. Prusament ASA — material page Prusa Polymers · 2026-08 · doc
  23. Effects of Fiber Orientation on the Coefficient of Thermal Expansion of Fiber-Filled Polymer Systems in Large Format Polymer Extrusion-Based Additive Manufacturing Materials 15(8):2764 · 2022-04 · paper
  24. ASA — FDM Material Data Sheet (includes 1000 h QUV exposure results) Stratasys · 2026-08 · tds
  25. PolyLite ASA Technical Data Sheet Polymaker · 2024-11 · tds
  26. 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
  27. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds
  28. Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
  29. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  30. HIPS — Knowledge Base Prusa Research · 2026-08 · doc