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How to Dry PCTG Filament

PCTG (Polycyclohexylenedimethylene Terephthalate Glycol) 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.

Dryer Temperature

65°C

Set on iDryer, Sunlu S1, Creality
Drying Time

4h

Minimum recommended duration
Target Humidity

<15%

Inside dryer during drying
Signs your PCTG filament needs drying
Popping / crackling sounds during printing
Excessive stringing
Bubbles in extrusion
Poor layer adhesion
Inconsistent extrusion
Rough surface finish
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

Polycyclohexylenedimethylene Terephthalate Glycol - Default Drying

65°C
240 min

1–1 of 1

Frequently Asked Questions
What temperature should I set my filament dryer for PCTG?

Set your filament dryer to 65°C for PCTG. This applies to iDryer, Sunlu S1, Creality Filament Dryer, and similar devices.

How long does PCTG need to dry?

Dry PCTG for at least 4 hours at 65°C. Heavily absorbed spools may need up to twice as long.

Can I print PCTG 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.