How To Dry Ultimaker Materials ?

Filaments can absorb moisture, which can lead to decreased print quality and to mechanical performance issues of the 3D printed part especially Ultimaker Materials . It is important to dry your material at the optimal conditions for each polymer type. It is possible to keep the material dry with a desiccant in a sealed bag, following the recommendations for PVA, but to actively dry moist materials, elevated temperatures are recommended.

Note:  As a rule of thumb, materials should be dried below the glass transition temperature (Tg) of a material, to prevent crystallization or softening of the material, that could cause the filament to stick together.

The Ultimaker spools are made of a polypropylene copolymer that can soften around 70-80°C. When drying a complete spool, it is important to stay below this temperature. An industrial oven or specific drying equipment such as a Printdry solution should be used, since household ovens can heavily fluctuate in temperature. Alternatively, it is also possible to place the spool in a cardboard box and use your build plate as the heating source.


Typically, it is sufficient to dry the spool for 4-8 hours. Moisture sensitive filaments such as Nylon, PVA and TPU95A that contain a lot of moist should be dried overnight (for 10-20 hours).

Optimal temperatures

The table below outlines the recommended drying temperature for each of the Ultimaker materials.

Tough PLA40°C
PPNot needed

Note:  For more information for optimal drying conditions of third party materials, please take a look at the technical data sheets or printing guidelines, e.g. on the Ultimaker Marketplace.