PLA vs PETG: which should you use?
They're the two most common 3D printing materials, and the choice is straightforward once you know the part's job. In short: PLA for display pieces and prototypes, PETG for parts that actually have to work. Here's the reasoning, and where each one's limits are.
Quick verdict
Same look on the shelf, different jobs in the real world.
| PLA | PETG | |
|---|---|---|
| Best for | Prototypes, display, indoor models | Functional, everyday, durable parts |
| Toughness | Rigid but brittle | Tough, slightly flexible |
| Heat resistance | Low | Medium |
| Moisture / chemicals | Limited | Resistant |
| Outdoor / UV | No | Limited |
| Detail & finish | Excellent | Very good |
PLA — precise, easy, and inexpensive
PLA prints cleanly with crisp detail, which makes it the best choice for visual models, prototypes, fit-checks, and indoor display pieces. It's rigid and dimensionally accurate, and it's the most economical material we run. Its limits are heat and toughness: PLA softens at relatively low temperatures (so it can deform in a hot car or direct sun) and it's brittle, meaning it can crack under impact or a sustained load rather than flex. Keep it indoors and out of structural duty and it's excellent.
PETG — the functional default
PETG is what most working parts should be made of. It's tough and slightly flexible instead of brittle, so it absorbs stress and impact, and it resists moisture and many chemicals. It tolerates more heat than PLA, and its layer adhesion is strong, so parts hold together under load. It's only marginally harder to print than PLA. For brackets, enclosures, mounts, organizers, and anything handled regularly, PETG is the safe, durable pick.
How to choose
- Showing it, not stressing it? PLA — best detail, lowest cost, ideal for prototypes and display.
- It has to function and last? PETG — tougher, more heat- and moisture-tolerant, the everyday workhorse.
When to step up to ABS or ASA
If the part needs to take real heat or hard impact indoors, or it lives outdoors, even PETG isn't the end of the line. ABS handles more heat and impact for indoor end-use parts, and ASA adds the UV and weather stability that outdoor parts need. That comparison is its own guide: PETG vs ABS vs ASA, and for sun and weather specifically, the best material for outdoor parts.
Marking either one
PLA and PETG can both carry a permanent laser mark — a serial number, QR code, logo, or part ID — added during production and included in your quote. It's a permanent surface mark, not ink or a label, so it's tamper-proof.
Upload your part and see the price
Choose PLA or PETG in the order tool, add an optional laser mark, and get an instant price — or let the finder pick for you.