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Elast‑O‑Pure® Sil70

USP Class VI, VMQ translucent silicone elastomer specifically formulated for biopharmaceutical applications.

TYPICAL APPLICATIONS
  • Biopharmaceutical

In biopharmaceutical production, maintaining a contamination-free environment is critical, which is why James Walker offers Elast-O-Pure Sil70, a platinum-cured silicone engineered for single and multi-use biopharmaceutical environments.

As a silicone elastomer, it does not readily support microbiological growth. This makes it ideal for use in clean environments and the manufacture of medical devices.

Our platinum-cured Elast-O-Pure Sil70 translucent pharmaceutical grade of silicone is available in a hardness grade of 70 IRHD, making it suitable for a wide variety of fluid sealing duties. With over a decade of experience in biopharmaceutical manufacturers with high-purity sealing materials, Elast-O-Pure Sil70 is a trusted choice for those looking to ensure product integrity and maintain the highest levels of cleanliness in their single use and multi use operations.

  • Compliance with FDA 21 CFR 177.2600
  • Independently tested and certificated to USP Class VI
  • ADI Free (Animal Derived Ingredient Free)
  • FDA-compliant
  • Offers exceptional resistance to steam with low extractables
  • Low compression set ensures long-term sealing performance
  • Ideal for CIP, SIP, and high-temperature biopharmaceutical environments


  • Platinum-cured
  • High temperature resistance, up to +200°C constant with dry heat
  • Low levels of the extractables that can leach from material to promote contamination in a pharmaceutical process
  • Translucent

Suitable for sterilisation with SIP systems at up to +130°C and most CIP systems. Resistant to WFI systems at up to +80°C.

Standard components - including biopharmaceutical O-rings and hygienic clamp seals - to any size, shape and international standard.

Complex custom shapes by precision moulding. Full materials traceability provided for all items; an attribute that is highly desirable for critical applications.

Our Elast-O-Pure materials are used in a broad range of specialist applications within the biopharmaceutical industry:

  • Process connections
    • Elast-O-Pure hygienic seals are critical for ensuring the integrity of process connections in biopharmaceutical manufacturing. They provide leak-free seals, safeguarding against contamination and product loss.
  • Bioreactors
    • In bioreactors, where maintaining sterility is essential, these hygienic seals ensure secure vessel sealing, preserving the integrity of the bioprocess and preventing contamination.
  • Chromatography columns
    • In chromatography applications, Elast-O-Pure hygienic seals play a vital role in maintaining the purity and efficiency of the separation process by preventing leaks and contamination.
  • Purification skids
    • These seals are integral to purification skids, where they help uphold the purity of the product being processed, ensuring effective and clean operations.
  • Vessels
    • Whether used in storage or transport, Elast-O-Pure hygienic seals provide airtight, sanitary seals, protecting the contents from contamination.
  • Filtration
    • In filtration systems, these seals enhance reliability and efficiency, ensuring that targeted particles are retained while preventing contaminants from entering.
  • Single-use systems
    • Elast-O-Pure hygienic seals are ideal for single-use systems, offering a dependable and hygienic solution for disposable components in biopharmaceutical processes.

For more information on our highly specialised materials for hygienic (tri-clamp and tri-clover) seals, follow this link.

Expert to Expert

Want to discuss your project, engineering or materials challenge expert to expert? Simply provide us with your contact details and a little information about the application you are working on, and one of our experts will contact you as soon as possible.

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