Can resin or 3D-printed decor go under a heat lamp?
Updated 13 October 2026
Keep printed plastic out of the basking spot and off heat mats. A common PLA filament starts to bend under load at about 55 °C (131 °F), and PETG holds out to roughly 60 to 80 °C, depending on the grade. Resin pieces should also stay out of direct contact with lamps, mats and basking bulbs.
What softens, and when
| Material | Starts to soften or bend | Source |
|---|---|---|
| PLA (printed) | About 55 °C (131 °F), heat deflection | Prusament PLA data sheet |
| PETG (printed) | About 79 to 81 °C glass transition; 60 to 73 °C heat deflection | Filament data sheets |
| Resin | Varies by resin; the makers of our resin pieces give no figure |
Data sheet figures depend on the grade and on how a piece was printed, so treat them as a guide, not a limit.
How hot a vivarium gets
For a leopard gecko, ReptiFiles aims for a basking surface of 34 to 36 °C (94 to 97 °F). That is well under the figures above, but a piece that touches a bulb or lies on a heat mat is not at the basking temperature. Check the surface of any piece near the heat with an infrared thermometer, as both ReptiFiles and the RSPCA advise for the basking spot.
What our pages say
Every Nocturne Habitat piece lists its material and the maker's heat advice. The maker of the Tower House, for example, advises keeping it below 50 °C (122 °F), out of direct heat-lamp light, and not washing it in hot water.
Sources
- Prusament PLA technical data sheet (2022) ↗: PLA heat deflection temperature of 55 °C
- MakeItFrom, PLA compared with PETG ↗: PETG glass transition and heat deflection
- ReptiFiles, Leopard gecko care sheet ↗: basking surface for a leopard gecko; infrared thermometer
- RSPCA, Leopard gecko care sheet ↗: checking temperatures daily