Wet filament can cause popping sounds, bubbles, rough surfaces, inconsistent extrusion, excessive stringing and weaker layer bonding. The right drying temperature depends on both the polymer and the specific filament formula, so use the chart below as a safe starting point and always follow the instructions from your filament manufacturer when they differ.
Quick rule: use controlled heat plus airflow. Desiccant helps keep a dry spool dry, but it normally cannot remove deep moisture from a wet spool quickly.
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Filament Drying Temperature Chart
| Filament | Starting Temperature | Typical Time | Important Note |
|---|---|---|---|
| PLA / PLA-CF | 45–55°C | 4–8 hours | Start near 45–50°C for heat-sensitive PLA or plastic spools. |
| PETG | 60–65°C | 4–6 hours | High-flow PETG may need stricter drying and dry-box printing. |
| ABS | 65–70°C | 4–6 hours | Some brands specify a higher temperature; follow the spool data. |
| ASA | 65–70°C | 4–6 hours | Reseal promptly after drying. |
| TPU / TPE | 45–55°C | 4–8 hours | Flexible-filament formulas vary widely; check the manufacturer first. |
| Nylon / PA | 70–80°C | 8–12 hours | Very wet PA may need 12–24 hours; printing from a dry box is strongly recommended. |
| PC | 75–85°C | 6–8 hours | Some pure PC and PC blends require different settings. |
| PVA | 45–50°C | 8–12 hours | Highly moisture-sensitive; keep sealed or print directly from a dry box. |
| PVB | 50–55°C | 4–6 hours | Drying helps reduce bubbles and cloudy surface defects. |
| PP | 55–65°C | 6–8 hours | Check the specific blend and spool temperature limit. |
These are conservative starting ranges for consumer filament dryers, not universal specifications. Pigments, fillers, polymer blends, spool materials, dryer airflow and sensor accuracy can all change the correct setting. The filament manufacturer’s instructions take priority.
Which Sovol Filament Dryer Should You Choose?
For common materials such as PLA, PETG, TPU, ABS and ASA, a dryer that reaches 70°C covers most everyday use. Nylon and PC generally benefit from a higher-temperature dryer and longer drying cycles.
Best for everyday materials
Sovol SH02 Filament Dryer
Two-spool capacity, 150W 360° PTC heating and an adjustable 40–70°C range. A practical choice for PLA, PETG, TPU, ABS and ASA.
€54.99
View SH02
Best for multi-material workflows
Sovol SH03 Filament Dryer
Four-spool capacity, dual independent chambers and 200W + 200W PTC heating up to 85°C. Better suited to PA, PC and mixed-material workflows.
€109.00
View SH03How to Tell If Filament Is Wet
One symptom alone does not prove that moisture is the cause, because incorrect temperature, retraction or flow settings can create similar defects. Look for several of these signs together:
- Popping, hissing or crackling at the nozzle
- Visible bubbles or foamy extrusion
- Unexpected stringing and oozing
- Rough, inconsistent or cloudy surfaces
- Weak layer bonding or brittle filament
- Inconsistent extrusion despite a clean nozzle and correct settings
Why Filament Drying Improves Print Quality
Many 3D printing polymers absorb moisture from humid air. When wet filament enters a hot nozzle, the absorbed water can turn into vapor and disturb the melt flow. In moisture-sensitive polymers such as nylon, PC and PETG, water at processing temperature can also contribute to polymer-chain degradation. The result may be bubbles, surface defects and weaker parts.
Effective drying needs two things: enough controlled heat to help moisture move out of the filament and airflow or venting to carry the released moisture away. Heating a sealed chamber without removing humid air can slow the process.
Material-by-Material Drying Notes
PLA
PLA is less moisture-sensitive than nylon or PVA, but an opened spool can still become brittle or print with extra stringing. Start at 45–50°C and increase only when the filament manufacturer allows it. Standard PLA can soften near common dryer temperatures, so avoid using 60–65°C as a universal PLA setting.
PETG
PETG often shows moisture through stringing, bubbles and inconsistent glossy surfaces. A starting range of 60–65°C for 4–6 hours works for many formulations. High-flow PETG used on fast printers may need more consistent storage and printing directly from a dry box.
ABS and ASA
ABS and ASA usually respond well to 65–70°C for 4–6 hours in a forced-air filament dryer. Some manufacturers specify higher temperatures, so check the product data before increasing the setting. Keep the spool sealed after drying.
TPU and TPE
Flexible materials can absorb enough moisture to create rough, bubbly extrusion. Because TPU formulas and Shore hardness values vary, use 45–55°C as a cautious starting range and follow the brand-specific instructions. A blanket recommendation of 70°C can be too hot for some TPU products or spools.
Nylon / PA
Nylon is highly hygroscopic and may absorb problematic moisture within hours in a humid room. Dry at 70–80°C for 8–12 hours; a heavily exposed spool may need a longer cycle. For long prints, feed the filament directly from a dry box so it does not reabsorb moisture during the job.
Polycarbonate / PC
Use 75–85°C for 6–8 hours as a consumer-dryer starting point. Pure PC, PC blends and fibre-filled grades can have different requirements, and some manufacturer instructions exceed the capability of an 85°C dryer. Check the technical data for the exact product before printing critical parts.
PVA
PVA support material is extremely moisture-sensitive. Dry at 45–50°C for 8–12 hours, then keep it sealed with fresh desiccant or print directly from a dry box. Do not rely on desiccant alone to restore a spool that is already wet.
A Safe Filament Drying Process
- Check the filament label or technical data sheet. Use the brand’s setting when it differs from a general chart.
- Check the spool. Cardboard, adhesive and low-temperature plastic spools may tolerate less heat than the filament.
- Start at the lower end of the range. This is especially important for PLA, TPU and unfamiliar blends.
- Allow moisture to escape. Use a dryer with active airflow or automatic venting.
- Recheck the print. If popping or bubbles remain, continue drying rather than immediately increasing the temperature.
- Seal the spool after drying. Store it in an airtight box or bag with regenerated desiccant.
Safety note: A dedicated filament dryer is safer and more consistent than a household oven. Many ovens cycle well above their set temperature at low settings, which can deform filament or the spool. Never use a microwave or toaster oven, and avoid using food-preparation equipment for filament.
How to Store Filament After Drying
- Use an airtight container or vacuum bag with desiccant.
- Keep nylon, PVA, TPU and PC sealed whenever they are not being printed.
- Regenerate or replace desiccant according to its own manufacturer instructions.
- Label the spool with the drying date and setting that worked.
- Remember that desiccant is mainly for maintenance; heat and airflow are normally required to dry a wet spool.
Filament Drying FAQ
Should you dry every new spool?
Not necessarily. A properly sealed spool may print well immediately. However, moisture-sensitive materials such as nylon, PVA, TPU and some PC or high-flow PETG grades often benefit from drying before an important print.
Can filament be overdried?
The main risk is excessive temperature rather than a few extra hours at a safe temperature. Too much heat can soften filament, deform the spool or affect additives. Follow the manufacturer’s maximum temperature and inspect the spool during the first cycle.
Can you dry filament while printing?
Yes. If the dryer has a filament outlet and the spool rotates freely, printing from the dryer helps moisture-sensitive filament stay dry throughout a long job.
Can desiccant dry wet filament?
Desiccant is excellent for slowing moisture absorption during storage, but it usually works too slowly to remove moisture from the centre of a wet spool. Dry the filament with controlled heat and airflow first, then use desiccant to maintain it.
Why do different brands recommend different temperatures?
Products sold under the same material name can use different polymer grades, pigments, fillers and additives. Dryer design and spool construction also matter. That is why this chart provides starting ranges rather than one universal temperature.
Keep Your Filament Ready to Print
Choose the dryer around the materials you use most. The Sovol SH02 is a practical two-spool option for common materials up to 70°C. For four-spool capacity, independent chambers and temperatures up to 85°C, choose the Sovol SH03.
Reference note: Settings were reviewed against current manufacturer guidance, including Bambu Lab’s filament drying recommendations and Polymaker’s PolyDryer material guidance. Always use the instructions supplied with your exact filament when they differ.
