Carbon, Inc.

EPU 41

Highly elastic, tear resistant, and energy returning

Highly elastic, tear resistant, and energy returning

EPU 41 is a production-scale elastomeric material that is especially well-suited for elastomeric lattices where high resiliency is needed. EPU 41 has higher resilience (energy return) and better retention of elastomeric properties than EPU 40 at temperatures > -10°C. As a production scale offering, EPU 41 is only offered in 5-L bulk packaging and requires MMD (meter, mix, and dispense) equipment for proper dispensing of the material in bulk quantities. It is comparable to commercial TPUs with a Shore A hardness of 70.


Durometer (Shore A Hardness)

20 kN/m

110 lbf/in

Tear Strength

250 %

Elongation At Break

30 %

Bayshore Resilience

-10 °C

14 °F

Glass Transition Temperature

EPU 41 Strain and Stress Graph

Color Fastness

EPU 41 has excellent color fastness after UV aging.

Cold Temperature Performance

EPU 41 retains its elastomeric properties to -10 °C temperatures.


EPU 41 has passed requirements for biocompatibility according to ISO 10993-10.

Experience EPU 41

Stretch it or squish it and watch it rebound.


Our engineering materials sample kit includes EPU 41, EPX 82, RPU 70, and RPU 130.

Lattice Puck and Tensile Bars


Find a trusted partner from the Carbon Production Network to help print your first Carbon DLS™ part.

Computer monitor with CAD drawings

Specialized, Carbon, & EPU 41

“Comfort is performance.”
Garrett Getter Product Manager, Specialized

Full Case Study

Example Applications

Cushioning with Elastomeric Polyurethane

Bouncy elastomeric lattices maximize comfort with precision tuning of energy return. EPU 41 excels in these applications thanks to its high elasticity, tear resistance, and cycle fatigue resistance.

These applications combine a need for high elasticity, tear resistance, and energy return, in addition to isotropy, great surface finish, and accuracy.

Twisted Lattice

3D Printed Parts in Production

Stack of Adidas Midsoles

adidas 4D Midsole

adidas’ revolutionary 4D midsole uses an elastomeric lattice, made with EPU 41.

Carbon lattice innovation — the adidas story

Fizik Adaptive Bike Saddle

fizik Adaptive Saddle

fizik’s unique Adaptive cycling saddle with an elastomeric lattice, made with EPU 41.

fizik and Carbon® Announce Partnership to Create Digitally Printed Bike Saddle: Adaptive

Specialized Bike Saddle

Specialized S-Works Power Saddle w/ Mirror

Specialized produced a cycling saddle using EPU 41 twice as fast as their normal development cycle.

Specialized Innovates at 2x the Speed with Carbon

EPU 41

Ask an Additive Expert

Imran, a Senior Applications Engineer, breaks down EPU 41’s unique mechanical properties.