Freudenberg Sealing Technologies
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Power for Sustainable Energy

Sealing Solutions for the Entire Energy Value Chain

Wind turbines, solar and hydroelectric plants, fuel cells, battery systems and switchgears. These are just a few energy applications that rely on technology innovations from Freudenberg Sealing Technologies. Working with customers around the world, experts at the company develop unique material and product solutions that solve tough industry challenges and help pave the way to a sustainable energy future.

Today, the whole world of energy is in motion. Join Us!

Transformer Seals

Sealing Solutions for Energy Transmission and Distribution

Power station for energy transmission and distribution on meadow under blue sky

When the power goes out, modern life comes to a standstill. Yet brownouts and blackouts are increasingly frequent. One reason: As demand for electricity increases, the infrastructure that supplies it gets older. In some industrialized nations, the, the transformers and switchgears that make up the power grid date back to the middle of the last century. They are not designed to handle fluctuating power derived from renewable resources. A system upgrade based on innovative products and materials is required.

Growing use of electric vehicles is likely to intensify load fluctuations going forward. Smart grid technology that incorporates aggregate capabilities will help meet energy needs in the future.

Changing standards are also key. SF6 gas, a common substance used to insulate transformers and switchgears in the past, is being phased out in favor of more environmentally friendly technology including nitrogen, CO2 or Green Gas for Grid (g3). These options will require new sealing solutions.

Product Range for Energy Transmission & Distribution


O-rings for flanges, wiring and high voltage switches

  • CIIR Materials - The new standard for highest demands in gas permeation, durability and low temperature resistance
  • CR and EPDM materials - proven and reliable

Simmerring® radial shaft seals for circuit-breakers, switches and switch operation

  • Simmerring® - the FST Original
  • PTFE Forseal – for circuit breakers

UL certified flat gaskets for switch gear housings

  • Self-sealing silicone tapes for insulation and sealing of high-voltage cables and power busbars

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