What Freudenberg Sealing Technologies does

Freudenberg Sealing Technologies (FST) is the sealing technology business unit of the privately-held Freudenberg Group, headquartered in Weinheim, Germany. The company designs, manufactures, and sells engineered sealing solutions serving automotive OEMs and Tier 1 suppliers, industrial manufacturers across food and beverage, pharmaceutical, chemical processing, and power generation, as well as emerging hydrogen economy applications. Its product portfolio spans radial shaft seals (anchored by the Simmerring brand introduced in 1929), static seals, dynamic seals, hydraulic accumulators, and specialized products including DIAvent thermal runaway venting for EV batteries, 3D-printed thermal interface materials, and Catalyst-Coated Membranes for PEM fuel cells and electrolyzers. Underlying capabilities include in-house elastomer formulation (FFKM SIMRIZ, Fluoroprene XP, Quantix ULTRA), precision molded part manufacturing, and the patented CCM roll-to-roll production process.

FST operates a B2B industrial sales model with three primary channels: direct enterprise sales for custom engineered solutions, a global distributor network (including the Corteco aftermarket brand) for replacement and MRO demand, and the EASY online ordering platform for standard products with real-time pricing and SAP OCI/Punchout integration. Revenue is generated primarily through hardware sales of sealing components and systems, with quote-based enterprise contracts for custom solutions and standardized pricing through EASY. The company employs over 10,000 people, operates the world's largest test facility for seals, and maintains production and warehouse locations across Germany, the United States, Japan, China, the United Kingdom, and several other European countries. Recent acquisitions include Trygonal Group (April 2024, expanding European manufacturing footprint) and Alto Products Corp. (late 2025, expanding aftermarket transmission offerings).

Name

Freudenberg Sealing Technologies

Legal name

Freudenberg FST GmbH

Website

https://fst.com

Company type

Private

Founded year

1849

Operating status

Operating

Headcount range

5,001–10,000 employees

Short description

Freudenberg Sealing Technologies is a global leader in engineered sealing solutions for automotive, industrial, and hydrogen applications, serving OEMs, Tier 1 suppliers, and aftermarket customers with proprietary elastomer products and precision molded components.

Ownership category

akta.pro rank

Product category

Industrial Sealing Solutions

NAICS

Gasket, Packing, and Sealing Device Manufacturing (339991), Rubber Product Manufacturing (3262), Rubber Product Manufacturing for Mechanical Use (326291)

SIC

Gaskets, Packg & Sealg Devices & Rubber & Plastics Hose (3050), Fabricated Rubber Products, Nec (3060)

akta.pro primary industry

Seals, Gaskets & O-Rings (Industrial Elastomer) (IMANALAC)

akta.pro secondary industries

Seals, Gaskets & Fluid Connectors (O-rings, packings, rotary seals, quick couplers) (IMAHAGAI), Automotive Weatherseals, Gaskets & Sealing Systems Manufacturing (Door/Window/Trunk Seals) (IMACAKAI), Adhesives & Sealants Chemicals (IMAEABAA)

Keywords

• Industrial sealing solutions
• Elastomer materials manufacturing
• Radial shaft seals
• Fuel cell membranes
• Precision molded components

Headquarters

HQ city

Weinheim

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Sealing Products and Components: Sale of engineered sealing solutions including O-rings, radial shaft seals, hydraulic seals, and specialized sealing products for automotive, industrial, and hydrogen applications. Revenue generated through direct sales, distributor networks, and online ordering platforms.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Freudenberg Sealing Technologies designs, engineers, and manufactures elastomer and polymer sealing products—Simmerring® radial shaft seals, static and dynamic seals, DIAvent® battery venting elements, Catalyst-Coated Membranes (CCM) for fuel cells and electrolyzers, 3D-TIM thermal interface materials, and eCON electrically conductive nonwovens—alongside a comprehensive material portfolio and supporting digital engineering tools, sold to automotive, industrial, and hydrogen-economy customers via direct sales, the EASY B2B ordering platform, and a global distributor network.

Product overview

Freudenberg Sealing Technologies is a global leader in sealing solutions with a comprehensive portfolio of engineered products and services. The core offering centers on Simmerring® radial shaft seals (invented in 1929), complemented by static seals (O-rings, gaskets, clamp seals), dynamic seals (rod seals, piston seals, wipers), and specialized products (DIAvent® battery venting, 3D-TIM thermal management, eCON grounding solutions). For hydrogen and fuel cell applications, the company offers CCM (Catalyst-Coated Membranes) for both PEM fuel cells and electrolysis. Supporting services include CAD configurators (Simmerring® Selector, O-Ring Calculator, Hydraulic Selector), the Chemical Resistance Guide and CIP/SIP Guide for material selection, Freudenberg Xpress® for rapid prototyping, and the EASY B2B ordering platform. Materials expertise spans FKM, FFKM, EPDM, HNBR, PTFE, and specialty elastomers.

Differentiator

Problem solved

Functional benefit

Brands

• Simmerring: Premium radial shaft seal brand, the original invention that established the company's leadership in sealing technology
• Dichtomatik
• Corteco
• Freudenberg Xpress
• Quantix ULTRA
• SIMRIZ
• DIAvent
• eCON
• 3D-TIM
• FACT (Freudenberg Adhesive Clean Technology)
• CASCO
• CCM
• Fluoroprene XP

Products and services

• Simmerring® Radial Shaft Seals The original radial shaft seal invented by Freudenberg in 1929, providing reliable sealing for rotating shafts across diverse industrial and automotive applications.
• Static Seals Sealing solutions for stationary joints including O-rings, flat gaskets, clamp seals, cover seals, extruded seals, dairy couplings, and hygienic Usit®-rings for leak-free connections.
• Dynamic Seals Seals designed for moving applications including radial shaft seals (Simmerring®), rotary and swivel seals, rod seals, piston seals, wiper seals, guide rings, damper and steering seals, valve stem seals, U-cups, V-ring seals, and Radiamatic shaft seals.
• DIAvent® Pressure Equalization and Thermal Runaway Venting Pressure equalization and thermal runaway venting elements for lithium-ion battery systems, electric drivetrains, and electronic enclosures.
• 3D-TIM Thermal Interface Materials 3D-printed thermal interface materials for efficient heat dissipation in electronic and power-electronics applications.
• eCON Electrically Conductive Nonwoven Grounding Solutions Electrically conductive nonwoven grounding solutions for safe dissipation of electrostatic charges in automotive and industrial applications.
• CCM for PEM Fuel Cells Catalyst-Coated Membranes for proton-exchange-membrane fuel cells, manufactured using a patented cost-optimized roll-to-roll production process that enables cost-effective metal-salt catalysts with maximized reactive surface area.
• CCM for PEM Electrolyzers Catalyst-Coated Membranes for PEM electrolyzers enabling efficient hydrogen production from water splitting, with high electrochemical efficiency and extended service life.
• Hydraulic Accumulators Energy-storage devices for hydraulic systems that store potential energy to smooth pressure peaks and maintain system performance, including accumulator applications.
• Diaphragms Precision diaphragms for pumps, valves, and actuators in fluid handling, chemical processing, and medical applications.
• Forseal Self-Lubricating Maintenance-Free Seals Self-lubricating, maintenance-free seals designed for demanding applications in food, pharmaceutical, and clean-room environments.
• Precision Molded Parts Custom precision-molded elastomer components for complex geometries in automotive, industrial, and medical applications.
• Freudenberg Xpress® Rapid Prototyping and Small-Series Production Rapid prototyping and small-series production service using CNC technology for fast delivery of custom sealing solutions to minimize customer downtime.
• Material Portfolio (Elastomers and Polymers) Comprehensive elastomer and polymer materials including FKM, FFKM SIMRIZ®, EPDM, HNBR, NBR, NR, ACM, PTFE, PEEK, POM, PUR/PU, 98 AU 30500 Polyurethane, VMQ/PVMQ/FVMQ, Fluoroprene XP, and Quantix® ULTRA for demanding sealing applications.
• EASY Ordering Platform Online B2B procurement platform providing real-time pricing, product availability, CAD downloads, EDI, OCI/Punchout (SAP), EASY Business Connector ERP integration, and order tracking for Freudenberg sealing products.
• Lube & Seal Engineering Service Coordinated sealing and lubrication engineering service delivered jointly with Klüber Lubrication, providing paired elastomer and lubricant recommendations for optimal sealing-system performance in drive-technology applications.
• Freudenberg Adhesive Clean Technology (FACT) Surface-treatment technology process that enables adhesive-free bonding of elastomers to metal and plastic substrates during vulcanization, eliminating primers, binders, and solvents in seal manufacturing.

Quantifiable outcome

• DIAvent maxFlow delivers 2.5x flow rate improvement over previous generation (>190 L/s at 300 mbar)
• +1 more outcomes

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

Feature5 records

Partnerships

Three partnerships are on record, tiered core and supporting.

• Alto Products Corp.coreStrategic or Co-development Partner · 4 November 2025Acquisition of Alto Products Corp., a manufacturer of transmission parts, to expand aftermarket offerings and strengthen market position globally. Enables complete transmission rebuild solutions and growth in heavy-duty and recreational vehicle segments.
• Trygonal GroupcoreStrategic or Co-development Partner · 30 April 2024Acquisition of Trygonal Group, a sealing solutions company with operations in Germany, Spain, Austria, and Switzerland, to enhance service business and manufacturing capabilities. Expands regional coverage, manufacturing processes, and includes a broader range of Freudenberg materials.
• Klüber LubricationsupportingStrategic or Co-development PartnerStrategic partnership for Lube & Seal service combining Freudenberg's sealing technology expertise with Klüber's lubricant specialization. Provides coordinated elastomer and lubricant recommendations for optimal sealing system performance in drive technology applications.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Greene Tweed: Greene Tweed manufactures high-performance sealing solutions and elastomer components for demanding applications in oil & gas, aerospace, semiconductor, and industrial markets—mirroring FST's engineered-seals positioning in harsh environments.
• James Walker: James Walker manufactures high-performance sealing products, gaskets, and elastomer-based components for industrial, energy, and defense applications—closely comparable to FST's engineered sealing portfolio.
• Bal Seal Engineering: Bal Seal specializes in custom-engineered seals, springs, and canted-coil springs for medical, aerospace, and industrial applications—competing with FST in precision-molded and specialized sealing niches.
• ElringKlinger: ElringKlinger supplies gaskets and sealing technologies for combustion and electric drivetrains, including cylinder head gaskets, specialty gaskets, and e-mobility components—directly overlapping FST's automotive sealing portfolio.
• Trelleborg Sealing Solutions: Trelleborg's Sealing Solutions division is the most direct competitor to FST, producing O-rings, radial shaft seals, hydraulic seals, and engineered elastomer components for automotive, industrial, and aerospace customers worldwide with comparable global manufacturing and materials capabilities.

Broad incumbents

• Dana Incorporated: Dana's sealing and thermal management product lines serve automotive and commercial vehicle OEMs, providing overlapping drivetrain sealing solutions and increasingly e-mobility components as powertrains electrify.
• Parker Hannifin: Parker's Industrial Sealing Division and O-Ring business directly compete with FST on hydraulic/pneumatic sealing, while the broader conglomerate competes across motion and control technologies—offering overlapping capabilities from a much wider portfolio.
• IDEX Corporation: IDEX operates sealing solutions businesses (including the former MGZ and Technetics brands) alongside fluidics and fire & safety products—overlapping with FST on engineered elastomer seals and complementary industrial components.
• SKF: SKF's sealing products business competes directly with FST's Simmerring radial shaft seals, while the broader bearings and rotating equipment portfolio addresses overlapping industrial customers across automotive and process industries.
• Hutchinson (TotalEnergies): Hutchinson's Precision Sealing & Anti-Vibration business produces elastomer-based sealing and vibration-damping products for automotive and industrial markets, overlapping directly with FST's elastomer seals and precision molded parts.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/user/FreudenbergSealing
• LinkedInlinkedin.com/company/fst
• Xx.com/freudenberg_fst

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries7 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A3 records

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Freudenberg Sealing Technologies