Updated 8 months ago ​by Tomáš Chvalina

Flex is a very strong and flexible material. There are many use cases where hard plastic is not the ideal or even unusable at all. But whether you need a phone cover, an action camera case or wheels for your RC car, flexible is the way to go.

Before you start printing from Flex, clean the nozzle from the previous material - preheat the nozzle and load PLA to remove any other previous material. When loading Flex, loosen the extruder (idler) screw(s). Keep in mind that when printing from Flex, the automatic filament change function may not work properly.

Flex has very good abrasion resistance, remains flexible in cold environments, and is resistant to many solvents. It doesn’t shrink much when cooling down, so you can be fairly accurate with your measurements and perfect fit models.



Flexible and elastic

Needs more steps when loading

Little shrinking

Can be tricky to print

Good layer adhesion

Needs to be printed slowly

Nozzle temperature: 230°C
Bed temperature: 50°C - 65°C (Depending on the size of the object, bigger objects tend to need higher bed temperature.)
Some very soft flex materials can bond to the bed too much and require the use of glue stick on the bed as a separator to prevent PEI damage.


Find out more troubleshooting tips here: Community Forum | Assembly Manuals | Youtube channel | info@prusa3d.com

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