PETG sits in the gap between PLA and ABS — stronger and more heat-resistant than PLA, easier to print and less smelly than ABS. It’s the material most people reach for once PLA starts feeling too brittle for what they’re actually building. Get the settings right and it’s a genuinely easy filament to work with; get them wrong and it strings and blobs more than almost anything else on the shelf.
Here’s what actually matters.
What Makes PETG Different
PETG (Polyethylene Terephthalate Glycol) is the same base chemistry as the plastic in most drink bottles, modified to print better. That heritage is why it’s naturally more impact-resistant and flexible than PLA, holds up to higher temperatures without softening, and has a glossy, slightly translucent finish PLA can’t match — genuinely useful if you’re printing anything meant to let light through.
It’s also more resistant to UV and outdoor conditions than PLA, though not as tough as ABS for pure mechanical strength.
PETG Print Settings That Actually Work
| Setting | Range | Notes |
|---|---|---|
| Nozzle temperature | 230-250°C | Start at 235°C and adjust based on stringing |
| Bed temperature | 70-80°C | A heated bed is genuinely needed, unlike PLA |
| Print speed | 40-60mm/s | Slower than PLA — PETG doesn’t cool as fast |
| Retraction | 4-6mm, higher speed | The single biggest lever against stringing |
| Cooling fan | Low (0-30%) | Too much cooling causes poor layer adhesion |
The most common mistake is treating PETG’s settings like a slightly-hotter version of PLA. It isn’t — the low cooling-fan requirement in particular catches people out, since every instinct from printing PLA says “more fan is better.”
Why PETG Strings (And How to Actually Fix It)
Stringing is PETG’s most common complaint, and it comes down to the material’s higher viscosity and tendency to ooze between travel moves. Before touching your slicer settings, check the basics first:
- Dry the filament. PETG is hygroscopic — it pulls moisture from the air faster than PLA does, and wet PETG strings far worse than dry PETG. If your filament’s been open for more than a few weeks in South African humidity, dry it before blaming your settings.
- Increase retraction distance in small steps (0.5mm at a time) until stringing clears up, rather than jumping straight to an aggressive setting that can cause other print defects.
- Drop your temperature 5°C at a time if retraction tuning alone doesn’t fully solve it — PETG strings more the hotter it runs.
- Slow down travel moves in your slicer if your printer supports it separately from print speed.
Get these four right and PETG stops being “the stringy one” and starts being genuinely easy.
PETG’s Real Pros and Cons
Where PETG wins:
- Stronger and more flexible than PLA — better for anything that takes a knock or needs to bend slightly under load
- Handles heat far better than PLA (PLA softens around 60°C; PETG holds up well past 70°C), so it survives a hot car or a sunny windowsill
- No enclosure needed, unlike ABS
- Minimal odour while printing
- Better outdoor and UV resistance than PLA
Where PETG loses:
- Strings more than PLA even when dialled in well
- Slight stringing aside, it’s genuinely harder to get a perfectly clean surface finish than PLA
- Not as strong or heat-resistant as ABS for genuinely demanding functional parts
- More prone to bed adhesion problems — PETG can bond too well to a bare glass bed and rip off a chunk when removed if you’re not using the right bed surface or adhesion aid
Best Use Cases for PETG
PETG earns its place for anything that needs to survive real-world conditions PLA can’t handle:
- Outdoor brackets, hooks, and mounts — the UV and weather resistance matters here
- Anything that sits in a car — phone mounts, cup holders, dashboard clips
- Functional parts under light mechanical load — brackets, enclosures, snap-fit parts
- Light diffusers and lamp shades — using its natural translucency
- Food-adjacent items (with the right food-safe filament and post-processing) — PETG’s base chemistry is the same as food packaging plastic, though printed parts still need proper post-processing to actually be food-safe
PETG vs PLA vs ABS, Quickly
If you already know PLA and are deciding whether PETG or ABS is the next step: PETG is the easier of the two to print and doesn’t need an enclosure, but ABS still beats it on raw heat resistance and strength for serious functional or automotive parts. For most people moving on from PLA, PETG is the right next material — ABS is worth learning once you have a specific project that actually needs it.
Getting Started with PETG
Creality’s CR-PETG (R295/1kg) is a solid, consistent starting point and comes in eight colours including a transparent option if you want to put that translucency to use. Soleyin’s Basic PETG (R295/1kg) is a straightforward alternative in the same price bracket.
Whichever you pick, store it properly between prints — PETG left open to South African humidity for weeks will string regardless of how well you’ve tuned your settings.
Browse the current PETG filament range for colours and stock, or see the full filament catalogue if you’re still deciding between materials.