Flexible-filament moisture-control decision
TPU filament drying temperature: 60–75°C examples
TPU is moisture sensitive, but 'TPU' still does not identify one drying cycle. Prusa publishes 60°C for its TPU guidance, Bambu Lab and Polymaker publish 70°C examples, and Creality's current family guide spans 65–75°C depending on the method.
A documented 70°C system covers the Prusa, Bambu TPU 95A HF, Polymaker TPU95, and Creality consumer-dryer examples on paper. It does not clear Creality's 75°C blast-dryer upper bound. More heat is not automatically better: excessive temperature can soften filament or damage a spool.
Direct answers
The questions that change the equipment decision
What temperature should TPU filament be dried at?
Use the exact product instruction. The official examples on this page span 60°C to 75°C, with different times and drying methods.
Is a 70°C filament dryer enough for TPU?
It fits several cited TPU cycles on paper, including Bambu TPU 95A HF and Polymaker TPU95 at 70°C for 8 hours. It remains below a 75°C requirement.
Should TPU stay in a dry box while printing?
Bambu specifies less than 20% RH for printing and storage of TPU 95A HF, while Creality marks TPU for drying during use. Follow the exact product's feed and humidity guidance.
Product-specific evidence
Official temperatures with the product and method attached
| Official product guidance | Temperature | Time | Method and limit |
|---|---|---|---|
| Prusament TPU | 60°C | 4–6 hours | Prusa drying guidance. A lower-temperature official TPU cycle exists and should not be overwritten by a hotter generic preset. |
| Bambu Lab TPU 95A HF | 70°C | 8 hours | Blast drying oven. Bambu also specifies less than 20% RH during printing and storage for this product. |
| Polymaker PolyFlex TPU95 | 70°C | 8 hours | Product TDS drying setting. This matches Bambu's cited temperature and time, but remains a product-specific instruction. |
| Creality TPU family guidance | 70°C / 65–75°C | 8–12 / 8 hours | Creality dryer / blast dryer. Equipment type changes the documented range; the 75°C upper bound is above common 70°C systems. |
Do not average these settings. The range shows why a material-family preset cannot replace the current instructions for the purchased spool.
Capability screen
How documented dryer ceilings compare
Creality Space Pi
Fits the cited 60–70°C cycles. Its 70°C maximum fits the Prusa, Bambu, Polymaker, and Creality consumer-dryer examples on paper, but not the cited 75°C upper bound.
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Check Space Pi price at CrealitySUNLU FilaDryer S4 Pro
Clears the full 60–75°C span. Its 85°C maximum provides temperature headroom and two independent chambers. Use only the exact approved TPU setting rather than the maximum.
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Check FilaDryer S4 Pro at SUNLUEIBOS Polyphemus
Clears the full 60–75°C span. Its documented 80°C ceiling clears the cited range on paper and adds two-spool rotation and storage features.
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Check Polyphemus price at EIBOSA maximum is a rejection screen, not a performance test. It does not prove chamber uniformity, recovery time, sensor accuracy, or the temperature at the center of a loaded spool.
Three checks before buying
Keep the requirement separate from the appliance
Hardness is not a drying specification.
TPU 95A products can still publish different instructions. Use the purchased product page or TDS.
Do not default to the dryer's maximum.
Excess heat can soften flexible filament, deform a spool, or create feeding problems.
Drying and printer feeding are separate checks.
A dryer may handle the cycle while an AMS, Bowden path, or long PTFE route remains unsuitable for the flexible filament.
Decision path
Resolve the drying workflow in this order
- 01Confirm the exact TPU and spool.
Record hardness, manufacturer, temperature, time, method, spool heat limit, and target humidity.
- 02Use moisture evidence before retuning.
Pair storage history with popping, bubbles, rough extrusion, or a controlled before-and-after print.
- 03Choose the simplest capable workflow.
After temperature is satisfied, compare capacity, outlet routing, print-through behavior, and low-humidity storage.
Primary source trail
Manufacturer documents used for this decision
Related drying decisions
Continue with the exact job or material.
Use the reference chart to find the requirement, then move to the material or workflow guide that answers the purchase question.
Start with product-specific examples from 55°C through 100°C.
Open decision →PETG troubleshootingDecide whether PETG needs dryingUse symptoms, storage history, and exact maker cycles before buying hardware.
Open decision →PLA moisture controlCompare official 45–60°C PLA cyclesSee why product, method, time, and spool safety must stay attached.
Open decision →High-temperature dryingScreen dryers for PA6-CFCompare consumer-dryer ceilings with cited 80°C and 100°C requirements.
Open decision →PLA-CF moisture controlCheck the cited 55°C PLA-CF cyclesKeep temperature, time, method, and abrasive-nozzle requirements separate.
Open decision →ASA capabilityMatch a dryer to a 65–80°C ASA cycleSee why a 70°C ceiling fits some official examples but not all of them.
Open decision →PC moisture controlCompare cited 75–100°C PC cyclesSeparate ordinary PC, PC Blend, and PC-CF before screening dryer temperature.
Open decision →See which 70°C examples fit—and where a higher documented ceiling matters.
You are hereUnderstand why 85°C dryers fail and a 110°C system is only a partial answer.
Open decision →Drying versus storageChoose a dryer, dry box, or bothSeparate active moisture removal from keeping a verified-dry spool dry.
Open decision →Confirm the spool heat rating, approved method, ventilation, electrical requirements, fire-safety instructions, and current manufacturer guidance before applying heat.