If you’ve just bought your first 3D printer, the filament shelf can feel overwhelming. In New Zealand, the two materials you’ll actually use day-to-day are PLA and PETG — and the choice between them matters more here than in most countries because of our humidity.
This guide breaks down how PLA and PETG behave on a real Kiwi workbench, where each one shines, and why we stock our PETG range from R3D Printing rather than generic PLA.
The short answer
- PLA is the easiest material to print, cheap, and good for display models, prototypes, and decorative parts.
- PETG is tougher, more heat-resistant, and far less moisture-sensitive during printing — making it the better default for functional parts in NZ.
If you only want to keep one filament in your cupboard, we’d pick PETG every time. Our R3D PETG Pro range prints reliably at high speeds on basically every printer we’ve tested in Auckland.
Strength and durability
PLA is rigid but brittle. Drop a PLA bracket on a concrete garage floor and it will often crack — particularly after a hot summer in a parked car.
PETG is closer to “engineering plastic” territory. It bends before it breaks, shrugs off UV and humidity over time, and resists most common chemicals (automotive fluids, household cleaners, etc.). For anything load-bearing, outdoor, or going into a workshop, PETG is the safer bet.
If you need carbon-fibre stiffness for a drone frame or jig, our R3D PETG Pro CF Black gives you the engineering properties of PETG with a much more dimensionally stable matte finish.
Heat resistance
A black PLA part on the dashboard of a car parked in Tauranga summer sun will sag. PLA softens around 55-60°C; on a hot day inside a closed car, surface temperatures easily exceed that.
PETG handles roughly 70-75°C before deforming, which is enough to survive most real-world NZ environments — letterboxes, garage shelves, the back deck.
Printing in NZ humidity
This is where PETG genuinely wins for us.
Auckland sits at around 78-89% relative humidity all year (we covered the details in Why dry your filament). Both PLA and PETG are hygroscopic, but PLA shows wet-filament symptoms — stringing, popping sounds at the nozzle, surface defects — much faster.
PETG is still happiest dry, but it’s far more forgiving of a spool that’s been out of its bag for a week. If you’ve got a Kingroon 3D-X2 active dryer running alongside the printer, either material will print beautifully — but PETG without a dryer is much more usable than PLA without one.
Print settings at a glance
| Setting | PLA | PETG |
|---|---|---|
| Nozzle temp | 190-220°C | 220-240°C |
| Bed temp | 50-60°C | 70-80°C |
| Cooling fan | 100% | 30-50% |
| Print speed | 50-80 mm/s | 40-60 mm/s |
| Build surface | PEI, glass, glue | PEI (textured) |
Our full breakdown lives in the print settings guide, and our PETG tuning article covers the NZ-specific tweaks (cooling, retraction, moisture defects) in depth.
When to choose PLA
- Display models, miniatures, and decorative prints
- Educational use where heat resistance doesn’t matter
- Multi-colour prints — PLA flows more predictably
When to choose PETG
- Functional parts that will be used or stressed
- Anything that lives outside, in a garage, or in a car
- Tools, jigs, fixtures, organisers
- Prints that need to survive an Auckland summer
- Parts you don’t want to redo in six months
Our recommendation for new NZ printers
Start with a single 1kg spool of R3D PETG Pro in Gray or Black, and a Kingroon 3D-X2 dryer. That’s the smallest kit we’ve found that produces consistent, durable prints in a Kiwi shed or apartment — without fighting moisture from day one.
When you’re ready to push into engineering-grade work, add a roll of R3D PETG Pro CF Black for stiffer, more dimensionally stable parts.