Our Services

Elastomer Conductive Moulding and Electrically Conductive O-Rings

Elastomer Conductive Moulding and Electrically Conductive O-Rings

At Wye Valley Precision Engineering, we specialise in the precision moulding of electrically conductive elastomers — an advanced manufacturing technique that delivers exceptional performance in electromagnetic compatibility (EMC) and environmental sealing applications. This process enables the production of complex, high-accuracy components such as RFI and EMI shielding gaskets, tailored to meet demanding aerospace, military, and industrial standards.

Electrically Conductive Moulded O-Rings

Our electrically conductive moulded O-rings combine high-quality elastomer bases with specialised conductive fillers to achieve both electrical continuity and environmental protection. These O-rings are used across industries including aerospace, defence, telecommunications, automotive, and medical devices, where reliability and precision are essential.

Conductive Fillers

We use a variety of conductive materials to meet different performance and cost requirements, including:

  • Silver
  • Nickel graphite
  • Carbon
  • Silver aluminium

These fillers are distributed throughout the elastomer matrix, maintaining a continuous electrical path that prevents electromagnetic interference (EMI) from penetrating critical equipment housings.

Composition and Construction

The key to the performance of conductive O-rings lies in their material composition and construction:

  • Electromagnetic Continuity: Conductive particles within the elastomer create a uniform conductive network, ensuring uninterrupted EMI shielding.
  • Environmental Sealing: In addition to electrical performance, these O-rings also provide IP68-level sealing, protecting against dust, moisture, and other contaminants.
  • Corrosion Resistance: Select fillers and base materials provide robust resistance to corrosion, even in harsh environments.

  • Silicone Elastomers: A preferred base material thanks to its wide operating temperature range and excellent elasticity, making it an ideal binder for conductive fillers.
  • Fluorosilicones: Used where enhanced chemical and fuel resistance are required.
  • Duo-Seal Technology: Some advanced designs combine conductive and non-conductive elastomers within a single seal — ensuring both effective EMC shielding and comprehensive environmental protection.
  • Precision Moulding: Our moulding process allows for the creation of small, intricate, and high-tolerance components, ensuring consistency and repeatability across production runs.

Wye Valley Precision Engineering offers a catalogue of ready-tooled standard connector O-rings, including specifications such as:

  • MIL-C-38999
  • MIL-C-26482
  • MIL-C-81511

In addition, we provide custom tooling and moulding to meet precise customer requirements, producing bespoke EMC gaskets and O-rings designed for specific applications.

  • Accurate tolerances: Manufactured to tight dimensional requirements.
  • Miniature capability: Ideal for small and intricate parts.
  • Environmental sealing: High IP-rated protection from dust and moisture.
  • Corrosion resistance: Long-lasting performance in harsh environments.
  • Material versatility: Silicone and fluorosilicone bases with a full range of conductive fillers.
  • Cost-effective: Combines EMI shielding and sealing in a single component.