---
title: EPU 41
slug: materials/epu-41
description: Discover EPU 41, a premier elastomeric material designed for high resilience applications in lattice structures. With exceptional tear resistance and performance even at low temperatures.
docTags: 
createdAt: 2024-06-28T18:15:01.267Z
---

# Overview

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**Highly elastic, tear resistant, and energy returning**

EPU 41 is a production-scale elastomeric material that is especially well-suited for lattices where high resiliency is needed. EPU 41 has higher resilience (energy return) and better retention of elastomeric properties at temperatures > -10°C. It is comparable to commercial TPUs with a Shore A hardness of 70.
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![EPU 41 Example](https://res.cloudinary.com/carbon3d/image/upload/Education/Materials/elastomer/EPU-41/epu-41-elastomeric-bike-saddle.png)
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# Resource Links

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**[About the Material](https://www.carbon3d.com/materials/epu-41)**
Material overview and uses cases  
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**[Technical Data Sheet](https://docs.carbon3d.com/files/technical-data-sheets/tds_carbon_epu-41.pdf)**
Mechanical properties and data
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**[Safety Data Sheet](https://www.carbon3d.com/stewardship)**
*Login required*
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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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**German/Deutsch**
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::File{src="https://api.archbee.com/api/presign/dptYqcTHPbVZhe3zuNg4v-Hw5JOEJfrJRF3lsAVFYjf-20241123-005836.pdf" label="EPU 41 Protocol v0403_German-Deutsch.pdf"}
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**Spanish/Español**
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::File{src="https://api.archbee.com/api/presign/dptYqcTHPbVZhe3zuNg4v-7M1C12wN0H3kGmgQnwRMG-20241123-005849.pdf" label="EPU 41 Protocol v0403_Spanish-Espanol.pdf"}
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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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# Part B Salt Crystals

EPU 41 Part B can form salt crystals when left open in contact with air, or when liquid material is left around the mouth of the container. Avoid formation of **salt crystals **on rim of **Part B** container with simple lab practices.

- Wipe mouth of container to clean off any resin prior to closing cap.
- Keep container closed when not in use.
  Part B loaded in an MMD counts as a closed container.

![Salt crystals on rim of Part B container](https://res.cloudinary.com/carbon3d/image/upload/Education/Materials/elastomer/EPU-41/EPU-41-Part-B-salt-on-rim.png "Salt crystals on rim of Part B container")