Filament guidePLA is the default 3D printing plastic, but it has limits. Leave it in a hot car or out on a balcony and it can soften or fade. PETG is the next step up for parts that need to live in the real world. Here's what it is, how Bambu Lab's PETG HF and PETG Basic compare, and when we reach for it.
Quick answer
The short answer
PETG (polyethylene terephthalate glycol) is a tough, slightly flexible plastic from the same family as water bottles. It handles more heat than PLA, takes knocks better and stands up to water and outdoor use.
Bambu Lab makes two everyday versions. PETG HF ("high flow") is built for fast printing. PETG Basic is the original, slower version, which Bambu's US store now lists as discontinued.
01
What is PETG?
PETG is a clear-to-colored plastic that prints at higher temperatures than PLA. Bambu prints PETG HF at 230–260°C (446–500°F) on a bed of 65–75°C. That extra heat in printing means more heat resistance in the finished part.
It's less stiff than PLA, so it bends a little before it breaks. That small give is why PETG is good for clips, hooks and parts that get handled. It also absorbs less water than many plastics, so it holds up in a bathroom or a garden.
02
PETG vs PLA, by the numbers
Bambu publishes test results for its PLA Basic, PETG HF and PETG Basic side by side. Here's what they show.
| Bambu's test | PLA Basic | PETG HF | PETG Basic |
|---|---|---|---|
| Heat deflection temp | 57°C | 69°C | 69°C |
| Impact strength (XY) | 26.6 kJ/m² | 31.5 kJ/m² | 52.7 kJ/m² |
| Bending strength (XY) | 76 MPa | 64 MPa | 65 MPa |
| Bending modulus (stiffness) | 2,750 MPa | 2,050 MPa | 1,670 MPa |
| Max print speed | ~300 mm/s | ~300 mm/s | ~200 mm/s |
Heat deflection temperature is the point where a part starts to sag under a light load. PETG's 69°C (156°F) versus PLA's 57°C (135°F) is the difference between surviving a sunny windowsill and not. PLA is stiffer, but PETG absorbs more impact. For a side-by-side of the two, see PETG vs PLA.
03
PETG HF vs PETG Basic
Bambu rates PETG HF at up to twice the speed of standard PETG, depending on the model. It's formulated to ooze and clump less at speed, and keeps a consistent finish across print speeds. In Bambu's tests it's stiffer than PETG Basic, while PETG Basic absorbs more impact.
For most jobs the two behave alike. Since PETG Basic is being phased out, PETG HF is the one we use for everyday PETG work.
04
What PETG is good for
- Planters, watering cans and garden fixtures
- Outdoor toys and signage that lives outside
- Hooks, clips, brackets and snap-fit parts
- Bathroom and kitchen organizers that get wet
- Car interior parts and anything near moderate heat
Bambu describes PETG HF as resistant to water, UV and temperature changes. That makes it a solid all-rounder for functional pieces.
05
Limits and design tips
- It's not food safe by default. For food-contact pieces, look at PLA Pure instead.
- It strings more than PLA. Fine, hair-like strands can appear between features. HF is tuned to reduce this, but very spiky designs still show it.
- Want a softer look? For a low-sheen finish that hides layer lines, PETG Matte is the better fit.
- It isn't the stiffest. For rigid, load-bearing parts, PETG-CF adds carbon fiber for stiffness.
- Give snap-fits a little room. PETG flexes, so slightly looser tolerances than PLA usually work better.
06
PETG at IMPRESO
We print PETG in-house at our Ridgewood, Queens studio, alongside a wide range of Bambu Lab filaments. Tell us where the piece will live and how it will be used, and we'll recommend PETG or a better-suited material. Every job is quoted individually.
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