Standard PLA softens around 55-60C, which means parts left in cars, near heat sources, or in outdoor sun exposure can deform. When your application involves heat, you need filament with a higher glass transition temperature. PETG handles temperatures up to 75-80C, and for even higher demands, specialty materials like ABS and ASA withstand 90-105C. Forgely-brand PLA is held to ±0.02mm diameter tolerance; the PETG and specialty materials we stock are chosen on the specs their makers publish, so check the spool for the range you are buying.
Choosing the right temperature-resistant filament depends on your specific heat exposure. PETG is the easiest upgrade from PLA, it prints on most printers without an enclosure and resists the moderate heat that defeats PLA. Our own PLA is lot-tracked and extruded in Utah; the PETG and specialty lines are stocked, not made here. Check our full material range for the right filament for your thermal requirements.
Why Forgely
- PETG for moderate heat, withstands 75-80C for automotive, outdoor, and kitchen-adjacent use.
- ±0.02mm tolerance on Forgely-brand PLA, measured per lot rather than quoted from a datasheet.
- Lot-tracked, consistent mechanical and thermal properties across production batches.
- Made in Utah, for our own PLA line, with the PETG and specialty materials selected and stocked here.
What filament survives inside a car?
Car interiors can reach 70-80C in direct sun. PLA will deform at these temperatures. PETG withstands up to 80C and is the easiest printing upgrade. For dashboard-mounted parts in extreme climates, consider ABS or ASA which handle 95-105C.
Can I anneal PLA for higher heat resistance?
Yes, annealing PLA in an oven at 70-80C for 30-60 minutes can raise its heat deflection temperature to 80-90C. However, annealing causes dimensional shrinkage of 2-5%, so parts may need to be designed oversized. For reliable heat resistance without shrinkage, printing in PETG is often simpler.
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