Filament Dryer Sunlu S2 by Sunlu — Fila Dryer S2, for 3D printing filament drying and moisture control

The Sunlu S2 Filament Dryer is a dedicated device for drying and maintaining low moisture in 3D printing filament. It combines a 360° circulating heating system with a large touchscreen and quiet operation to prepare spools for printing and to keep filament dry while printing. The unit supports common materials from PLA and PETG to more demanding filaments such as PA and PC, and accepts standard diameters for straightforward use in home workshops and professional environments.

Advantages

The filament dryer removes moisture that causes defects in prints, improving surface quality, layer adhesion, and dimensional accuracy. A 4.6" color touchscreen and one-click presets simplify selection of temperature and drying time. Even 360° heating ensures uniform drying across the spool, and the device can dry filament during printing. Low noise operation and support for multiple filament diameters add to user convenience.

Suitable for

• Drying PLA, PLA+, PETG, TPU, ABS and similar filaments before printing
• Preparing and storing moisture-sensitive filaments such as PA and PC
• Maintaining filament condition while printing to avoid extrusion issues
• Use in hobbyist workspaces and professional printing environments

When it may not be suitable

The Sunlu S2 is designed for standard filament spools and common diameters (1.75 mm, 2.85 mm, 3.00 mm); it may not accommodate non‑standard spool shapes or unusually large spools. Extremely rapid drying needs beyond the recommended temperature and time ranges may require industrial-grade drying equipment.

Key specifications

• Drying temperature range: 45–70 °C
• Recommended drying time: 3–6 hours
• Material temperature presets: PLA/PLA+/WOOD 45–50 °C; PETG/PVB/ABS/ABS+/HIPS/PVA/ASA/TPU/PMMA 50–55 °C; PA/PC 60–70 °C
• Heating system: 360° circulating heating
• Display: 4.6" touchscreen LCD with one-click settings
• Supported filament diameters: 1.75 mm / 2.85 mm / 3.00 mm
• Material compatibility: PLA, PLA+, PETG, TPU, ABS, PA, PC and others
• Operating mode: drying during printing supported
• Noise level: below 10 dB

How to use

Place a filament spool inside the dryer, set the material type or choose the recommended preset on the touchscreen, select the target temperature and drying time, then start the cycle. For continuous printing, route filament from the dryer to the printer and enable the drying-during-printing mode so the filament remains dry throughout the process. Typical drying cycles are 3–6 hours depending on material and moisture level; consult the preset suggestions for temperature ranges.

What to consider before purchase

• Ensure your filament spool dimensions and shape are compatible with the dryer
• Check that required filament diameters (1.75 mm, 2.85 mm, 3.00 mm) match your spools
• Confirm the supported temperature range (45–70 °C) suits the materials you plan to dry
• Consider the need to dry during printing if your workflow requires continuous filament feed

Usage recommendations

Use manufacturer presets as a starting point: set PLA at 45–50 °C, PETG/ABS-type materials at 50–55 °C, and PA/PC at 60–70 °C; allow 3–6 hours for effective drying and route filament directly from the dryer to the printer when printing to prevent moisture reabsorption.