PLA is easier to print, dimensionally precise, and ideal for prototypes and display pieces. PETG is stronger, more durable, and better for functional parts that face mechanical stress or outdoor exposure. Choose based on whether your part needs precision (PLA) or durability (PETG).
Property Comparison
| Property | PLA | PETG |
|---|---|---|
| Tensile strength | 50-60 MPa | 50-75 MPa |
| Impact resistance | Low (brittle) | High (tough) |
| Heat resistance | ~60°C | ~80°C |
| UV resistance | Low | Medium |
| Moisture resistance | Medium | Medium |
| Dimensional precision | Excellent | Good |
| Ease of printing | Very easy | Moderate |
| Biodegradability | Yes (industrial) | No |
When to Choose PLA
- Prototypes and concept models
- Display pieces and figurines
- Educational projects (easy, safe)
- Parts that don’t face heat or stress
When to Choose PETG
- Functional parts and mechanical components
- Parts exposed to temperatures above 50°C
- Outdoor use (with UV protection)
- Parts that need to flex without breaking
- Production parts that need durability
Printing Difficulty
PLA is the easiest material to print — it adheres well, doesn’t warp, and works without an enclosure. PETG requires a heated bed (70-80°C), careful cooling control, and moisture management.
Our Recommendation
Start with PLA for prototyping and visual models. Switch to PETG when your design moves from prototype to production. For outdoor or high-stress applications, consider ASA.
Individual results depend on your printer, environment and application.