---
title: EPU 45
slug: materials/epu-45
description: Carbon's EPU 45 a versatile strain-rate-sensitive elastomer that excels in energy absorption for high-impact applications while ensuring comfort at lower speeds. 
docTags: 
createdAt: 2024-06-28T18:15:37.785Z
---

# Overview

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**EPU 45** is a strain-rate-sensitive material that stiffens to absorb energy at high impact rates. This enables the design of highly breathable lattice geometries tuned for comfort at low-impact speeds and energy absorption at high-impact speeds. EPU 45 has excellent printability, allowing a wide range of part shapes and lattice geometries to be printed at a high yield.
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![EPU 45 Example](https://res.cloudinary.com/carbon3d/image/upload/Education/Materials/elastomer/EPU-45/EPU45-generic-helmet-liner.png)
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# Resource Links

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**[About the Material
](https://www.carbon3d.com/materials/epu-45)**Material overview and uses cases  
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**[Technical Data Sheet
](http://docs.carbon3d.com/files/technical-data-sheets/tds_carbon_epu-45.pdf)**Mechanical properties and data
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**[Safety Data Sheet](https://www.carbon3d.com/stewardship)** <font color="#6550ff">*Login required*</font>
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# Protocol Sheet

This downloadable handout provides important usage information, including instructions about compatible hardware, storage, resin dispensing, washing and curing. Print it out and bring it into the lab.

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**English**
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# Thermal Processing

Some resins may crystallize or freeze at lower temperatures requiring a thermal processing step, also known as incubation, prior to dispensing.

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Reference this downloadable PDF for instructions.

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