Ice9 Flex TPU Filament


Ice9 Flex is a TPE-based thermally conductive filament that is semi-flexible. The filament is electrically non-insulating and has a thermal conductivity of 8 W/m-K in the print direction. This filament is ideal for heat sinks, liquid cooling, and the most demanding thermal applications. Ice9 Flex works best with FDM printers that print flexible filaments.

Product Datasheet Download

Printing Guide Download


A new and improved version of TCP Flex with 33% higher thermal conductivity (Now at 8 W/m-K). Thermally conductive and electrically non-insulating FDM printing filament. Use this material when the highest thermal conductivity is required and electrical insulation is not important. The material has an electrical resistivity < 10^5 ohm-cm making it suitable for EMI/RFI shielding applications but not carrying electrical current.

Estimated lead time for orders is currently 3-5 business days.

TCPoly products are proudly made in the USA.

Safety Datasheet Download

Additional information

Thermal Conductivity (W/m-K)


Extruder Temperature (°C)


Bed Temperature (°C)



Dark Gray

Filament Diameters (mm)

1.75, 2.85

Spool Filament Weights (g)

1,000, 500

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Thermally Conductive Epoxy

Should your thermal application require an adhesive epoxy, we have found that MG Chemicals epoxy works well in our lab.

Downloadable Slicing Profiles

Configuration files for Ice9 Flex (right click to save file as).




Return Policy

Unopened filament can be returned for a full refund for 30 days.

Opened filament can be returned for a refund less a 15% restocking fee.

See full details here:

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