Freudenberg Sealing Technologies
Employee sits in front of three screens and constructs a seal

Design & Engineering

Evaluation of Sealing Systems

What sealing system is best suited for your application? Our experts analyze and test products for you.

Sealing solutions are complex systems whose function and service life depend on a variety of different factors. These include the interactions between the individual system components and the different operating conditions of the respective application.

The sealing experts at Freudenberg Sealing Technologies are here to assist you in developing or modifying your sealing system and provide recommendations for action based on your individual application parameters. In addition, they provide answers to the causes of failure in the event of system breakdowns. Our Sealing Systems Evaluation Services are available for a wide variety of product areas such as radial shaft sealing systems, hydraulic sealing systems, accumulators, specialty seals and static seals.

Choose from our range of services:

  • Initial consultation based on your individual requirements
  • Seal analyses for the evaluation of interactions in the tribological system
  • Testing under realistic operating conditions in the world’s largest test facility for seals
  • Simulations
  • Laboratory testing of seals, sealing materials, counter surfaces and lubricants

Combined picture of hydraulic piston and microscope

Test Benches

Test benches for highest security and perfect adjustment.

Seals only can achieve 100% of reliability if all process conditions incl. temperatures, pressures and media are compatible with each other. Therefore, we constantly invest in new technologies and the latest testing methods to avoid cost-intensive field tests. As technology leader, Freudenberg Sealing Technologies operates the world largest test field in the market.

Your benefits at a glance

  • Seal tests under real conditions
  • Less complexity
  • Lower development cost and quicker development results
  • Optimized sealing system (seal, shaft/rod, lubricant, process conditions)
  • Increased lifetime of components
Test Benches at a glance
Metal tubes with valves and orange circuit box

Tip: Also discover our CIP/SIP test bench, especially designed for the process industry to validate cleaning processes.

CAD Downloads

Our exclusive CAD service provides you with access to the design data of our products – comfortable and fast via download.

For both, our original Freudenberg products as well as Dichtomatik profiles, our database includes a large number of CAD models being ready for integration into your planning software.

In addition to helpful information such as housing dimensions, you can choose between 2D or 3D models.

Furthermore, the CAD tool offers numerous additional functionalities such as

  • Sectional drawings,
  • Projection mode,
  • Exploded view and animations.
  • Create your desired CAD model or download a PDF data sheet in no time at all.
View CAD Downloads
CAD model view of a FST seal

Tip: Download the appropriate CAD data for your search result from the e-Catalog or our online ordering platform EASY.


The e-Catalog provides an overview of our sealing systems.

Are you in need of a Simmerring®, an O-ring or another type of seal? We have just the right solution for you. The e-Catalog provides you with an overview of FST’s entire sealing portfolio. Whether you are looking for a Freudenberg premium seal or a Dichtomatik solution fulfilling industrial standard requirements – you’ll find the right seal here.

Discover the countless possibilities of the e-Catalog or contact us if you are looking for a customized solution.

In addition to the product search function, the e-Catalog offers a lot more helpful information and tools, such as

  • CAD data
  • Product and material sheets
  • Cross reference list and
  • Information on availability and prices.
View e-Catalog
Computer monitor showing the FST e-Catalog incl. a zoomed picture showing an installation space

Configurators & Selectors

Smart product configurators and selectors offer optimum support in selecting the right seal for your individual applications.

Three blue Simmerrings beside a monitore with the website of the Simmerring Selector on grey background.

Simmerring® Selector

Are you searching for a Simmerring® according to your application needs?

View Simmerring® Selector
O-Rings in different sizes

O-Ring Configurator

Are you searching for the right O-Ring and necessary groove?

View O-Ring Configurator

Material & Resistance Guides

The easy way to determine compatibility of chemicals and cleaning agents with sealing materials.

Chemical Resistance Guide

Get an exclusive insight in the results of decades of testing and experience with sealing material and media. The Chemical Resistance Guide shows you suitable sealing materials for common process media of the general and process industry, such as acids and sulfates and therefore supports you in optimizing your processes and maximizing the lifetime of seals in application.

Test tube with chemical liquid


Quickly and easily match the compatibility of sealing materials and cleaning agents: With our CIP/SIP Guide (Cleaning In Place/Sterilization In Place), you can precisely match the CIP/SIP media to your sealing products in use.

The right tool for every requirement:

  • Finding the right cleaning agent Do you already use seals made of materials you know? Then our Tool 1 will help you to find a suitable cleaning agent.
  • Finding the right sealing material Do you already use a special cleaning agent? Then use our Tool 2 to choose a suitable sealing material.
Water wave / splash with air bubbles

Lube & Seal

With Lube & Seal, Freudenberg offers you bundled internal know-how from a single source.

We offer you a unique service for which Freudenberg Sealing Technologies, specialist in sealing technology, and Klüber Lubrication, specialist in lubricants, have bundled their competences. In order to offer you the perfect combination of elastomers and lubricants for your application in drive technology, we have coordinated our chemical components.

Your advantages:

  • Cost savings
  • Reduced failure rates
  • "Lube & Seal certified" sealing system
  • Quality from the Freudenberg Group
  • Continuous improvement through knowledge from use cases
Get in contact with our service experts
Rotary shaft seal with lube

Tip: Read more about Lube & Seal in our brochure or Essential article . You are also welcome to visit us on our Klüber homepage for further information. Of course, we are always available to answer your questions personally.


The world of sealing technology explained in short videos.

Learn more about FST, sealing solutions and their areas of application. Discover how our seals are used in a wide variety of applications in short videos.

Numerous installation videos explain step-by-step how seals are installed properly without being damaged – this saves time and ensures a maximum seal lifetime. Watch the videos on our YouTube channel.

Watch Videos on YouTube
Seal in application


Do you have questions about an application, a seal, application limits, compatibility of materials or are you looking for a service or seal and need help?

With our hotline, you are spot on. If you cannot reach your known contact person right now or have no direct contact yet, you are welcome to call our hotline, which will directly connect you to our technical experts who will be happy to provide you with immediate advice and assistance.

As an alternative, you can also use our contact form to let us know your request and the right contact person will get back to you as soon as possible.

Many ways, one solution: our experts, whether chemists, engineers, application consultants, sales staff and many more, will be happy to advise you on +49 (0) 6201 - 960-66 66.

Service employee on phone answering hotline