Step 3 · Prepare the filament

When and how should I dry filament?

Quick answer

First check the drying status, temperature and time for the specific product. Drying removes moisture that has already been absorbed. A sealed bag or dry box helps keep new moisture away afterwards.

Material choicePrinter requirementsDryingFirst print
Recognise the signs

Typical symptoms of wet filament

  • Popping or hissing sounds while printing.
  • Hairs, strings and wisps on the surface of the part.
  • A rough, matte, uneven or bubbly surface.
  • A weak part whose layers separate easily.
Drying is not the same as dry storage

Drying uses heat and time to remove moisture already absorbed by the filament. Dry storage slows down new moisture absorption in a sealed bag or box with active desiccant. Silica gel alone will not quickly dry an already wet spool.

Product-page status

Three practical decisions

✓ Not needed

Normally use it immediately. Dry it later only if you see symptoms or the specific product note tells you to.

△ Recommended

The print may succeed without drying, but drying gives a more consistent surface and more reliable result.

! Required

Plan to dry the filament before printing. Without it, quality and layer strength are likely to be inconsistent.

Step by step

A safe drying workflow

  1. Check the drying temperature and duration on the product page. Different blends in the same material family may need different settings.
  2. Use a filament dryer or another suitable controlled drying solution. Make sure the device holds the desired temperature evenly.
  3. Dry for the stated time. A very wet spool or one left open for a long time may need a longer cycle if the manufacturer permits it.
  4. Let a very hot spool cool before handling. Do not bend hot filament or deform the spool.
  5. Print immediately or seal the spool in a dry environment. This is especially important for TPU, PA and other materials that absorb moisture quickly.
Safety before speed

Do not use a temperature that could soften the filament or spool. An ordinary kitchen oven can fluctuate significantly. The instructions for the specific product and drying device always take priority over this general workflow.

Before printing

Filament dryer

Heats the spool at a controlled temperature for a set time. A good choice when the material is already wet or the product page requires drying. Some dryers let you print directly from the dry box.

View filament dryers →
Between prints

Dry storage

Keep an opened spool in a sealed bag or box with dry silica gel. Check whether the desiccant is saturated and regenerate or replace it according to the manufacturer’s instructions.

Quick answers

Frequently asked questions about drying

Is a new vacuum-packed spool always dry?
Not necessarily. Packaging slows down new moisture absorption, but the material may already have picked up moisture during manufacturing, transport or packing. Follow the product-page status and watch for symptoms.
Does silica gel dry wet filament?
Silica gel is mainly suitable for maintaining a dry environment. Removing moisture already absorbed by the material requires suitable heat and time.
Can filament be dried more than once?
Generally yes, as long as you use a suitable temperature for the material and do not damage the spool. Follow the instructions for the specific product and drying device.

Filament ready? Make the first print.

Use the product-page starting settings, watch the first layer and stay with the printer for the first few minutes.