PETG vs ASA: Which Filament Should You Use?
PETG usually reduces setup burden; ASA is the more specialised option for weather-exposed parts.
Choose PETG when
- The part is primarily indoor or lightly exposed.
Choose ASA when
- UV and weather resistance are central requirements.
Side-by-side context
| Property | PETG | ASA |
|---|---|---|
| Difficulty | moderate | advanced |
| Nozzle starting range | 230-250 C | 240-270 C |
| Heat band | 2/5 | 4/5 |
| Flexibility band | 2/5 | 2/5 |
Ranges and bands are a starting point. Formulations, drying, build surface and printer environment can change the result.
PETG guide · ASA guide · Use the selector
Reviewed 2026-09-20.