PLA or PETG: which filament should you choose?

PLA is the easier filament to print. PETG handles heat, sunlight and knocks better.

When to choose PLA

PLA prints easily on almost any printer, warps very little and gives crisp detail. It suits models, prototypes, decorations and indoor items.

Its weakness is heat. PLA starts to soften at around 55 to 60 °C, so a part left in a parked car in summer can lose its shape.

When to choose PETG

PETG is tougher and bends before it breaks. It softens at around 75 to 80 °C and copes better with moisture and sunlight, so it suits brackets, holders and functional parts.

It strings more than PLA and can stick too firmly to a smooth PEI plate. A thin layer of glue stick protects the plate.

Typical settings

PLA usually prints at 190 to 220 °C with the bed at 50 to 60 °C. PETG usually prints at 230 to 250 °C with the bed at 70 to 85 °C. Start from the range printed on your spool, because it varies by brand and colour.

A simple rule

Start with PLA if the part stays indoors and carries little load. Choose PETG if it has to take heat, strain or time outdoors.