How to Dry PSU Filament
PSU (Polysulfone) absorbs moisture from the air, causing stringing, bubbles, and weak layer adhesion. Drying before printing eliminates these defects. Below are community-verified settings for any filament dryer.
150°C
Set on iDryer, Sunlu S1, Creality6h
Minimum recommended duration<15%
Inside dryer during dryingSigns your PSU filament needs drying
Community Drying Presets (1)
Verified settings shared by the 3D printing community. Compatible with iDryer, Sunlu S1/S2, Creality Filament Dryer, Sovol, and EIBOS.
| Title | Rating | Temperature | Duration | Actions |
|---|---|---|---|---|
Polysulfone - Default Drying | 150°C | 360 min |
Frequently Asked Questions
What temperature should I set my filament dryer for PSU?
Set your filament dryer to 150°C for PSU. This applies to iDryer, Sunlu S1, Creality Filament Dryer, and similar devices.
How long does PSU need to dry?
Dry PSU for at least 6 hours at 150°C. Heavily absorbed spools may need up to twice as long.
Can I print PSU directly from the dryer?
Yes — printing directly from an active dryer is the best approach for moisture-sensitive filaments. iDryer supports pass-through printing with active drying during your print.