Heat resistance
What filament should I use for heat?
First in this ranking: Bambu Lab PA6-CF.
- Nozzle250–290 °C
- Bed80–100 °C
- SpeedNot listed
- Dry—
- Density1.09 g/cm³
Ranked filaments
| Rank | Filament | Material | Nozzle | Bed | Price / kg | Datasheet | Retailer |
|---|---|---|---|---|---|---|---|
| 1 | Bambu Lab PA6-CFHighest practical step in this list. The catalog lists a nozzle range and a datasheet. Fiber-filled nylon is abrasive; confirm the hardened-nozzle cell on the product page. | PA/CF | 250–290 | 80–100 | Not listed | Datasheet | Not configured |
| 2 | Prusament ASAThe heat-resistant material Prusa documents for technical parts without jumping to nylon. Hot nozzle and a hot bed. | ASA | 250–270 | 100–120 | Not listed | Not listed | Not configured |
| 3 | Bambu Lab ASASame ASA class, with a datasheet, if the printer’s maximum is closer to this spool’s listed range than to Prusament’s. | ASA | 235–260 | 90–110 | Not listed | Datasheet | Not configured |
| 4 | Polymaker Polylite ABSABS is heat resistant relative to PLA and weaker in UV than ASA. Use it indoors, enclosed, and ventilated. | ABS | 230–260 | 90–110 | Not listed | Datasheet | Not configured |
How the ranking was chosen
Heat resistance here means the part stays solid somewhere PLA will not. It does not mean every printer in the catalog can extrude the winning row.
Pros and cons
Pros
- The ranking follows heat first: nylon and ASA before ABS, and PLA is absent on purpose.
- Each row has a catalog temperature, so ‘heat resistant’ is not a slogan without a number beside it.
Cons
- These materials warp, smell, or wear nozzles. An open-printer PLA profile will not run them.
- This catalog does not list a heat-deflection temperature on the product records. The 60 °C and 93 °C figures are Prusa’s, not a FilamentFacts test.
Printer considerations
- Read the printer’s maximum nozzle and bed temperatures before picking PA6-CF or Prusament ASA. A maximum below the filament’s listed minimum is a conflict, not a maybe.
- Prusa’s ASA article calls for an enclosure or a draft shield and ventilation. The same warning applies to ABS.
- A hardened nozzle matters for the fiber-filled nylon. If the printer page says the stock nozzle is not hardened, do not rank PA6-CF as printable on that machine.
What the community says
When people say a part melted in a car or on a windowsill, the replies leave PLA immediately. ASA is the name they use for ‘hot but still a normal filament.’ Nylon and fiber-filled grades show up when someone already has an enclosed printer and is willing to dry the spool and change the nozzle.
Sources & notes
Accessed 14 October 2026.
- ASA, Prusa Knowledge Base manufacturer
- PLA, Prusa Knowledge Base manufacturer
- ABS, Prusa Knowledge Base manufacturer
- Bambu Lab PA6-CF technical data sheet datasheet
- Prusa filament material guide manufacturer
- PETG or ASA for inserts left in a work vehicle, r/3Dprinting reddit
Related questions
- What filament should I use outdoors?Outdoor
- What filament should I use for a car interior?Automotive
- What filament should I use for a strong part?Strength
Questions
Is PETG heat resistant enough?
Better than PLA, and Prusa calls it suitable for technical parts, but the car and outdoor threads still report warped PETG. It is not in this heat ranking because ASA and PA6-CF are the materials those sources move to.
Why is there no heat-deflection column?
The imported filament records do not include one. Putting a single HDT on the row would be an invention. The Prusa figures stay in the prose, with the link.