Short answer: PETG is easier, cheaper, and handles water well. ABS takes more heat and finishes better, but is harder to print.
Side by side
| PETG | ABS | |
|---|---|---|
| Ease of printing | Easy | Needs an enclosure and experience |
| Heat | Softens around 70–80 °C (160–175 °F) | Holds shape to about 95–100 °C (200–210 °F) |
| Toughness | Tough, slightly flexible | Tough and impact resistant |
| Water and moisture | Excellent | Good |
| Finishing | Hard to sand and paint | Sands, paints, vapour-smooths well |
| Outdoors | Good | Yellows in sun (choose ASA) |
Choose PETG for
- Everyday functional parts
- Wet or humid locations
- Lower cost
Choose ABS for
- Hot places like car interiors
- Parts needing a smooth, painted, or glossy finish
Still unsure? Find a local shop and ask which material they'd recommend for your part.