Ceramic-to-Metal Seals & Technical Ceramic Sealing Solutions

UK OEM specialising in standard and bespoke ceramic-to-metal seal assemblies: From one-off prototypes to repeat production runs

Control at
Every Stage
Design
Procurement
Manufacturing
Quality
Tech support
Control at Every Stage
Design
Procurement
Manufacturing
Quality
Tech support
01 - WHO WE ARE

Your trusted partner in ceramic-to-metal seals

Ceramic Seals Limited is a leading UK manufacturer specialising in ceramic-to-metal seals, ceramic feedthroughs and advanced technical sealing solutions. We’re trusted by clients operating in ultra-high vacuum, high-pressure and extreme-temperature environments.

As an independent company with a reputation for technical excellence, we design and manufacture hermetic ceramic seals, electrical feedthroughs and metallized alumina components. From one-off prototypes to repeat production, our ceramic-to-metal seal assemblies are engineered for reliability, leak-tight performance and long-term stability.

About Ceramic Seals Limited
  • 65+

    Years of Experience

  • 500k+

    Products Manufactured

  • 95%

    On-Time Deliveries*

  • 99.7%

    Customer Satisfaction*

*Disclaimer: These figures are based on our previous 5 year period

02 - OUR PRODUCTS

Seal Assemblies You Can Rely On

Thermocouple Feedthroughs Thermocouple Feedthroughs
Multi-pin Feedthroughs Multi-pin Feedthroughs
Single Feedthroughs Single Feedthroughs
Electrical Isolators Electrical Isolators
Coaxial Connectors Coaxial Connectors
Sapphire Viewports Sapphire Viewports
03 - NEED SOMETHING SPECIFIC?

Bespoke Ceramic-to-Metal Seals & Custom Feedthrough Assemblies

Many applications require more than standard catalogue components. We specialise in the design and manufacture of bespoke ceramic-to-metal seals, custom ceramic feedthroughs, and advanced technical sealing assemblies engineered to meet demanding electrical, vacuum, pressure and thermal requirements.

Working directly with your engineering team, we support projects from initial concept and prototype development through to qualification and repeat production. Customisation can include:

  • Materials and geometry
  • Conductor configuration
  • Flange / housing design
  • Ceramic grade and metallization
  • Braze alloy selection
  • Plating / Protective finishes

Whether you require a single prototype or an ongoing production programme, we deliver reliable, hermetic ceramic sealing solutions built around your application.

Discuss Your Requirements
04 - QUALITY MATTERS

That’s why we’re AS9100 and ISO 9001 certified

We operate under AS9100:D and ISO 9001:2015 accredited quality systems, ensuring:

  • Full traceability
  • Process control
  • Repeatability

These certifications reflect our commitment to delivering high-reliability components that meet the stringent demands of aerospace, defence, and other critical industries.

Learn More

05 - HERE TO SERVE

Supplying into a wide range of markets

Aerospace
Defence
Medical
Research
Vacuum
Power Generation
Sub-Sea Oil & Gas
Laser & Optics