3D Printing Info

Filament comparison

ASA-GF vs rPETG

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

Glass-fibre ASA (ASA-GF) guideRecycled PETG (rPETG) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore ASA-GF comparisonsMore rPETG comparisons
ASA-GF vs rPETG — documented properties and sources
PropertyGlass-fibre ASA (ASA-GF)ASARecycled PETG (rPETG)PETG
Market snapshot
Listing priceUSD/kg; dated snapshots$29.95/kg median; $26.99–$33.99/kg across 3 dated product listings$28.99/kg median; $17.24–$39.98/kg across 4 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]PETG regranulated from recycled polyester waste; Polymaker's Fiberon PETG-rCF08 adds 8 wt% recycled carbon fibre[3][4][5]
Densityg/cm³1.07 (ZYLtech) and 1.11 (Spectrum), ISO 1183[1][2]1.27 (Prusament) and 1.30 (Fiberon PETG-rCF08), ISO 1183[3][5]
Typical priceUSD/kg1 kg spools cluster near 28[6][7]1 kg spools cluster near 29[8][9][10][11]
Price range across brandsUSD/kg27–34 across brands; Ambrosia 27, ZYLtech 30, Siraya Tech 34[6][7][12]17–40 across brands; Filament PM RePETG 17, 3DXTech ECOMAX 26, GreenGate3D 32, Fiberon rCF08 40[8][9][10][11]
Market availability1–5Niche, a handful of specialist brands[6][1][2]Available from several mainstream brands[8][9][10]
Spool sizes & diameters1.75 and 2.85 mm; 1 kg spools[2][6]1.75 and 2.85 mm; 0.5, 1 and 3 kg spools[10][9]
Typical applicationsOutdoor brackets and mounts that need stiffness and dimensional stability under sun and moisture[1][2]Not documented
Diameter tolerance± mm±0.01 at 95 % probability and ±0.02 at 100 % (ZYLtech)[2]±0.05 (Prusament PETG Recycled), against ±0.02 for virgin Prusament PETG[3][13]
Printing Parameters
Nozzle temperature°C240–270 (Spectrum); 240–280 (ZYLtech)[1][2]250 ± 10 (Prusament); 230–255 (Spectrum)[3][4]
Bed temperature°C80–100 (Spectrum); 90–110 on PEI (ZYLtech)[1][2]80 ± 10 (Prusament); 60–80 (Spectrum)[3][4]
Enclosure / chamber requirement1–5Enclosure recommended[14]Open frame is fine — Spectrum states a closed chamber is not necessary[4]
Part cooling fan0–20 % (Spectrum)[1]50 % (Prusament); up to 100 % (Spectrum)[3][4]
Bed surface & adhesion aidPEI sheet, BuildTak or an adhesion aid such as Magigoo (Polymaker); Simplify3D also lists Kapton tape and ASA slurry[15][16]Textured PEI, satin or powder-coated sheets; on smooth PEI a glue stick acts as a release agent[13][17]
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][18]Not documented
Warping tendency1–5Moderate — needs adhesion aid or draught shield[14]Not documented
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[15]Needs the right surface or a thin adhesive — the problem is releasing the part, not sticking it[13][17]
Stringing / oozing tendency1–5Slight — Polymaker advises 1–2 mm retraction at 20–30 mm/s[15]Moderate — retraction tuning needed; Polymaker names stringing as PETG's common quirk[17]
Overall printing difficulty1–5Intermediate — dry filament and a tuned profile; ZYLtech requires a hardened nozzle of 0.6 mm or larger[2][1]Easy — minor profile tuning; Spectrum describes printing as similar to standard PETG[4]
Extruder requirementZYLtech specifies a hardened nozzle 0.6 mm or larger; Spectrum bases its settings on a 0.5 mm nozzle[2][1]Not documented
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required — Spectrum recommends ruby or hardened, ZYLtech requires hardened[1][2]Brass fine indefinitely[3]
Abrasiveness1–5Highly abrasive — standard GF composite[1][2]Not documented
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[19]Low — recycled PETG prints on the same hardware as virgin PETG: no special hot-end, no drybox and no hardened nozzle[20][21]
Heat-creep / jam sensitivity1–5Slightly sensitive[16]Slightly sensitive[20]
Hotend requirementNo special hotend required[16]No special hot-end required[20]
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[22][23][24]Moderate (0.3–0.8 %) — recycled PETG shares the virgin matrix, which reaches 0.40 % saturated at 25 °C / 55 % RH[13]
Equilibrium moisture content at ~50 % RH%Not documented0.07 after 24 h and 0.10 after 7 days at 24 °C / 22 % RH (Prusa Polymers)[3]
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[25]Bubbling and popping at the nozzle, stringing and a rough surface[25]
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[25]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[25]
Storage requirementSealed with desiccant; Polymaker rates the styrenics moderate-sensitivity[25]Sealed with desiccant; Polymaker groups PETG with the highly hygroscopic materials[25][17]
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]43 ± 1.8 printed horizontal at yield, ISO 527-1 (Prusament), against 47 ± 2 for virgin Prusament PETG; Spectrum quotes 52 at yield on moulded specimens[3][13][4]
Young's modulusMPa2540–2890 (ZYLtech; specimen type not stated) and 2550 (Spectrum, injection-moulded), ISO 527[2][1]1500 printed horizontal, 1600 printed vertical (Prusament, ISO 527-1) — the same as virgin Prusament PETG[3][13]
Elongation at break%3.4 at break (ZYLtech; specimen type not stated); Spectrum quotes 2.80 at yield on injection-moulded specimens[2][1]4.5 at yield printed (Prusament); Spectrum quotes 400 at break on moulded specimens[3][4]
Flexural strengthMPaNot documented63 ± 1 printed horizontal, ISO 178 (Prusament), against 66 ± 2 for virgin Prusament PETG[3][13]
Flexural modulusMPa2130–2480 flexural modulus, ISO 178 (ZYLtech; specimen type not stated)[2]1800 printed horizontal, ISO 178 (Prusament)[3]
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]12 ± 1 printed horizontal and 15 ± 3 printed vertical, ISO 179-1 notched (Prusament)[3]
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]Charpy unnotched 25 ± 3 printed horizontal and 38 ± 11 printed vertical (Prusament, ISO 179-1)[3]
Layer adhesion / Z tensileMPaNot documented15 ± 5 (Prusa Polymers interlayer adhesion test), against 18 ± 4 for virgin Prusament PETG[3][13]
Brittleness1–5Brittle — snaps with little warning; elongation at break 3.4 %[2]Moderate[3]
Hardness (scale-specific)Shore A / Shore D / RockwellNot documented74 Shore D (Prusa Polymers method) — the same as virgin Prusament PETG[3][13]
Creep resistance / sustained load1–5Good — no creep test found; chopped glass fibre lifts modulus to 2540–2890 against 2379–2450 for unfilled ASA[2][23][22]Below average — no recycled-grade creep test; virgin PETG sagged from 12 to 17.1–20.4 mm over 5 days at 1.25 kg[26][27][28][29]
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][23][22]Moderate — no recycled-grade S-N curve; virgin printed PETG ran 79 000–193 000 cycles at 30 % of tensile strength[30]
Elasticity / flexibility1–5Rigid[2]Slightly flexible in thin sections[3]
Thermal Properties
HDT at 0.45 MPa°C100 (Spectrum, injection-moulded, ISO 75 at 0.45 MPa)[1]68 (ISO 75, 0.45 MPa) — the same as virgin Prusament PETG; Spectrum quotes 70[3][13][4]
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]68 (ISO 75, 1.8 MPa)[3]
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]Not documented
Continuous service temperature°C93 — Prusa publishes this as the temperature resistance of Prusament ASA[31]Not documented
Flammability / UL 94Flammable; no UL 94 rating published[22]Flammable; no UL 94 rating published for standard grades[32]
Environment & Chemical
UV resistance1–5Excellent — designed for permanent outdoor use; Spectrum states the parts resist prolonged UV and moisture exposure[1][33]Not documented
Chemical resistanceGood against weak acids, weak alkalis, oils and grease; dissolved by acetone[23]Withstands acids, alkalis, oils and UV exposure[17]
Food contactNot food safe[15]Not certified for food contact as filament[17]
Biodegradability / compostabilityNot biodegradable[15]Not biodegradable[17]
RecyclabilityNot accepted in household plastic collection[15]The feedstock itself — Spectrum describes collecting, shredding and re-homogenising PETG waste[4]
Health & Safety
Fume toxicity1–5High — hazardous VOC such as styrene; enclosure and filtration needed[34][14]Moderate — measurable VOCs and UFPs, ventilation advised[34]
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[14][34]Not documented
Ventilation / filtration requirement1–5Enclosure with carbon and HEPA filtration[34][14]Open a window / occasional ventilation[34]
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[15]Sands poorly — the material is tough and gums rather than powders[20]
Painting & finishingPaints readily; ASA holds colour outdoors so many parts are left unpainted[15]Not documented
Gluing & solvent weldingSolvent-welds with acetone[23]Cyanoacrylate; no common solvent welds PETG cleanly[20]
Vapour / chemical smoothingAcetone vapour smoothing works[23]No practical vapour smoothing[20]
Support material pairingHIPS breaks away or dissolves in d-limonene; Bambu Lab sells a Support for ABS that also serves ASA[14]Prints its own supports; Polymaker rates PolyDissolve S1 for PETG[20]
Solvents & Solubility
Soluble inAcetone dissolves the resin and leaves the fibre; MEK, THF, ethyl acetate and chlorinated solvents attack the styrenic backbone.[35][23]No common workshop solvent; 1,2-dichloroethane destroys it inside a week and dichloromethane — a carcinogen — dissolves the surface.[36][37]
Softened or crazed byLimonene attacks some grades — Prusa reports Prusament ASA Orange flaking apart as layer adhesion fails.[38]Acetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[36]
Solvent welding & smoothing agentAcetone vapour reaches only the resin fraction, so the fibre is left standing proud of the smoothed surface.[37][23]Dichloromethane brushed on is the only agent that smooths PETG — a controlled carcinogen, not workshop stock.[37]

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. Prusament PETG Recycled Technical Datasheet Prusa Polymers · 2026-08 · tds
  4. Spectrum r-PETG Technical Data Sheet Spectrum Filaments · 2026-08 · tds
  5. Fiberon PETG-rCF08 Technical Data Sheet V1.0 Polymaker · 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. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  9. GreenGate3D Recycled PET-G — product data GreenGate3D · 2026-08 · vendor
  10. Polymaker product catalogue Polymaker · 2026-08 · vendor
  11. Filament PM RePETG technical data sheet Filament PM (Plasty Mladec) · 2026-08 · tds
  12. Siraya Tech Fibreheart ASA-GF Filament product page Siraya Tech · 2026-08 · vendor
  13. Prusament PETG Technical Datasheet v1.1 Prusa Polymers · 2022-02 · tds
  14. ABS / ASA / PC Usage Guide Bambu Lab Wiki · 2026-08 · doc
  15. ASA — material basics Polymaker Wiki · 2026-08 · doc
  16. ASA — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  17. PETG — material basics Polymaker Wiki · 2026-08 · doc
  18. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  19. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  20. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  21. Filament Material Guide Prusa Knowledge Base · 2026-08 · doc
  22. Bambu Filament Technical Data Sheet V3.0 — ASA Bambu Lab · 2026-08 · tds
  23. PolyLite ASA Technical Data Sheet Polymaker · 2024-11 · tds
  24. Prusament ASA Technical Datasheet v1.1 Prusa Polymers · 2024-05 · tds
  25. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  26. PCTG vs PETG comparison — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  27. Extrudr PETG vs PCTG vs XPETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  28. Prusament PETG-CF vs PETG V0 vs PETG — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  29. BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  30. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  31. Prusament ASA — material page Prusa Polymers · 2026-08 · doc
  32. Prusament PETG V0 Technical Datasheet Prusa Polymers · 2026-08 · tds
  33. ASA — FDM Material Data Sheet (includes 1000 h QUV exposure results) Stratasys · 2026-08 · tds
  34. 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
  35. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds
  36. Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
  37. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  38. HIPS — Knowledge Base Prusa Research · 2026-08 · doc