# What filament should I use for heat?

For heat, skip PLA. Prusa says PLA softens above about 60 °C and gives ASA temperature resistance up to 93 °C; carbon-fiber nylon is the step up when the printer can reach its listed nozzle range and a hardened nozzle is appropriate.

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.

Updated 2026-10-14. Sources accessed 2026-10-14. Use case: Heat resistance.

## Ranked filaments

| Rank | Filament | Nozzle | Bed | Price per kg |
| --- | --- | --- | --- | --- |
| 1 | Bambu Lab PA6-CF | 250–290 °C | 80–100 °C | — |
| 2 | Prusament ASA | 250–270 °C | 100–120 °C | — |
| 3 | Bambu Lab ASA | 235–260 °C | 90–110 °C | — |
| 4 | Polymaker Polylite ABS | 230–260 °C | 90–110 °C | — |

## 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

- [ASA, Prusa Knowledge Base](https://help.prusa3d.com/article/asa_1809) (manufacturer)
- [PLA, Prusa Knowledge Base](https://help.prusa3d.com/article/pla_2062) (manufacturer)
- [ABS, Prusa Knowledge Base](https://help.prusa3d.com/article/abs_2058) (manufacturer)
- [Bambu Lab PA6-CF technical data sheet](https://cdn.shopify.com/s/files/1/0651/1555/4032/files/Bambu_PA6-CF_Technical_Data_Sheet-v2.pdf) (datasheet)
- [Prusa filament material guide](https://help.prusa3d.com/filament-material-guide) (manufacturer)
- [PETG or ASA for inserts left in a work vehicle, r/3Dprinting](https://www.reddit.com/r/3Dprinting/comments/1u0x4zs/petg_or_asa_for_milwaukee_packout_inserts_that/) (reddit)

HTML: https://filamentfacts.com/answers/heat