Welcome to Specialist Engineering Plastics

Seven key services, one specialist business.

As one of the UK's biggest distributors of high performance and commodity engineering plastics, we stock a diverse range of rod, plate, sheet, tube and film. Specialist Engineering Plastics provides customers with seven key services. From cutting, billeting, thickness planing, centreless grinding, bespoke product solutions, national delivery and technical support, we simply offer customers everything they need for the job.
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Our Markets

In partnership with many key market-leading brands such as Röchling, SEP is able to cater to a wide variety of markets.


Rail <br>Approval
Oil & Gas <br>Approval
Oil & Gas
Aerospace <br>Approval
Medical <br>Approval
Food <br>Approval
ISO 9001:2015 <br>Approval
ISO 9001:2015

Rail Approval

In areas making high demands on fire behaviour – such as transport and the electrical industry – manufacturers of plants and machinery often had to get along with an alternative to nylon so missed its outstanding mechanical properties.

Sustamid 6FR has been tested to several fire regulations including the new EU rail vehicle standard, DIN EN 45545-2:2013.

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Oil & Gas Approval

The petroleum industry has developed the NORSOK standard to ensure adequate safety, added value and cost effectiveness.

SustaPEEK is an ideal product for components used in demanding applications and has PASSED the Norsok M-710 criteria making it a suitable choice for sour gas environments.

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Aerospace Approval

Aircrafts must be very light and fuel efficient, at the same time mechanically stable and 100% safe.

We offer a wide range of materials for these demanding environments. They support light, safe, and long-lasting aircraft design with recognised approvals for flammability including:

  • BSS 7239
  • FAR25.853
  • FAR28.855
  • UL94 V0
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Medical Approval

Our range of medical grade (MG) products are made from materials especially developed for medical technology.

The MG products come with analysis results demonstrating biocompatibility conforming to ISO10993-5 and USP Class VI.

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Food Approval

Most of our food today is produced using industrial equipment.

We provide an extensive range of plastics for direct contact with food which depending upon the material, meet these requirements.

  • 10/2011/EC
  • 1935/2004/EC
  • 2023/2006/EC
  • FDA
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ISO 9001:2015 Approval

Our commitment to our customers is to deliver the highest possible service, and a product that meets the client’s quality requirements. We recognised the importance of accuracy, ensuring our service complements clients time and time again. These good practices have been distilled into a set of standardised requirements for a quality management system. SEP has been assessed and certified as meeting the requirements of ISO 9001:2015. You can download a copy of our certificate by clicking below.
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You have the right to access your personal data and, in some cases, to require us to restrict, erase or rectify it or to object to our processing it and the right of data portability.

Concerns or complaints can be made to info@seplastic.com or the Information Commissioner’s Office.