In 3D printing, where creativity meets precision, the quality of your prints depends heavily on the condition of your materials. Filaments like PLA, ABS, PETG, and TPU are widely used, but they easily absorb moisture from the air. This can cause stringing, weak layers, poor adhesion, or even nozzle clogs.
The solution? A reliable filament dryer. Enter the SUNLU FilaDryer S4, a four-spool powerhouse designed to keep your filament dry and your prints flawless.
Why Drying PLA, ABS, PETG, and TPU Matters
Moisture is the hidden enemy of 3D printing. When filaments absorb water, it turns into steam during extrusion, causing:
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Bubbling and rough surfaces
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Stringing and inconsistent flow
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Weak, brittle prints
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Nozzle jams and failed projects
Different materials react differently:
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PLA may warp or crack
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ABS can delaminate and smell worse
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PETG becomes stringy
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TPU loses flexibility
A dedicated filament dryer like the S4 restores spools to their best condition, ensuring smooth and reliable printing.
Key Features of the SUNLU FilaDryer S4
The FilaDryer S4 is built for makers who print often and with multiple materials. Here’s why it stands out:
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4-Spool Capacity – Dry up to four 1kg spools at once, perfect for multi-color or multi-material projects.
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Fast, Even Heating – 320W power + 3 fans heat up to 70°C quickly and evenly, preventing hot spots.
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Smart Humidity Control – Auto on/off between 25–50% humidity, adjustable for different filaments.
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Wide Compatibility – Works with 1.75mm, 2.85mm, and 3.0mm filaments; supports all printer models.
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Built-in Presets – One-touch settings for PLA, ABS, PETG, TPU, PA, and PC.
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Safe & Reliable – Triple safety system: PTC thermistor, temp switch, and smart software monitoring.
Unlike single-spool dryers, the S4 saves time, reduces waste, and improves efficiency for serious hobbyists and professionals.
SUNLU Filaments: Perfect Match for the S4
Pairing the FilaDryer S4 with SUNLU’s reliable filaments unlocks even better results:
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PLA & PLA+ – Easy to use, low warp, vibrant colors. Drying improves strength and finish.
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PETG – Strong, transparent, chemical-resistant. Drying reduces stringing and boosts clarity.
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TPU – Flexible and durable. Drying prevents bubbles and keeps elasticity.
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ABS & ASA – Tough and heat-resistant. Drying prevents cracks and layer separation.
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Specialty PLA (Rainbow, Silk, Wood, Meta) – Aesthetic filaments look cleaner and sharper when dried.
Most filaments come in 1kg spools, in a wide color selection, and work with standard FDM printers.
Real-World Benefits: S4 + Filament in Action
Imagine loading PLA red, PETG blue, TPU black, and ABS white into the S4. In just a few hours, all four are evenly dried and ready to print. Results you’ll see:
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PLA/PLA+: sharper details and stronger bonding
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PETG: reduced stringing and better transparency
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TPU: elasticity preserved without defects
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ABS/ASA: fewer cracks, stronger parts
With eight filament outlets and PTFE tubes, you can feed directly into up to four printers at once—keeping materials dry while you print.
Tips to Maximize Results
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Dry new spools before first use, and re-dry stored ones.
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Use PTFE tubes to keep filament dry during long prints.
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Adjust humidity settings for seasonal changes.
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Store dried filament in sealed bags.
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Experiment with preset times to find what works best.
Final Thoughts: Upgrade Your 3D Printing Setup
The SUNLU FilaDryer S4 isn’t just another accessory—it’s an essential tool for consistent, high-quality printing. Paired with SUNLU’s PLA, ABS, PETG, TPU, and specialty filaments, it ensures better results, less waste, and more reliable printing every time.
👉 Ready to level up your workflow?
Explore the SUNLU FilaDryer S4 and shop filaments on SUNLU’s official store.
Print drier. Print better. Print smarter.