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Connector Seals

More than a Seal. A New Platform for Battery Innovation.

Connector Seal combines sealing, integrated functionality and collaborative engineering to unlock the next generation of battery system design.

As battery packs evolve across industries—from power tools and robotics to medical devices, mobility and energy storage—the demands on safety, reliability, performance and cost continue to rise. Every new generation introduces new challenges at the interfaces between critical components.

What was once a simple sealing requirement has become a complex engineering challenge involving protection, integration, manufacturability, risk mitigation and system performance.

To address these challenges, Freudenberg Sealing Technologies pioneered the ConnectorSeal concept. More than a sealing solution, ConnectorSeals create a platform for function integration, design optimization and innovation. By combining multiple technical requirements into intelligent engineered solutions, they help manufacturers increase reliability, reduce complexity and unlock new possibilities for future battery architectures.

Backed by patented technologies, material expertise and proven manufacturing capabilities such as FACT Dry Bonding, ConnectorSeals enable customers to stay ahead of evolving market requirements—and turn challenges into competitive differentiation.

Successful battery systems are not created by better components alone. They are created through better integration.

Discover how Connector Seal can unlock new opportunities for battery innovation, integration and competitive differentiation.

Open the Door to Next-Generation Battery Systems

Why Conventional Sealing Architectures Fall Short

Traditional sealing and connector solutions were developed to address individual requirements. A seal provides sealing. A retainer provides positioning. A strain relief provides cable protection. Every new requirement typically adds another component, interface and assembly step.

As battery packs evolve, this approach creates increasing challenges:

  • More components increase complexity.
  • More interfaces increase potential failure points.
  • More assembly steps increase manufacturing risk and cost.
  • More packaging constraints reduce design freedom.
  • More demanding safety and environmental requirements push traditional solutions to their limits.

At the same time, battery manufacturers are expected to deliver higher energy density, longer lifetime, improved safety, faster assembly and lower system costs.

The challenge is no longer solving individual problems. The challenge is solving multiple problems simultaneously.

A Fully Integrated Connector Seal Concept

Freudenberg invented the ConnectorSeal™ concept — transforming a traditional sealing into an integrated engineering solution for next-generation battery packs.

This integrated approach enables:

Higher Battery Pack Reliability

Transform critical interfaces into robust, long-lasting system solutions that reduce failure risks and improve lifetime performance.

Integrated Functionality

Combine multiple requirements into one intelligent solution, reducing interfaces, components and potential failure points.

Safer Battery Architectures

Address evolving safety requirements through engineered solutions that protect critical interfaces and mitigate system risks.

Design Freedom

Unlock new battery pack concepts by optimizing installation space, simplifying architectures and supporting next-generation designs.

Competitive Differentiation

Move beyond conventional solutions and create battery packs that stand out through innovation, performance, cost and system-level optimization.

Innovating Together. Integrating What Others Separate.

Connector Seal enables new battery architectures through integrated functionality and collaborative engineering.

  • Fewer components → simplified system architecture
  • Improved reliability → reduced risk of leaks and contamination
  • Optimized performance → thermal and electrical efficiency
  • Lower total cost → fewer interfaces, faster assembly
  • Greater design flexibility → tailored to your application
  • Designed to Differentiate → Engineered to Do More

Get the full breakdown of features, materials, and design options in the solution sheet.

Your Partner for Reliable Connector Sealing Solutions

Freudenberg Sealing Technologies combines over 175 years of experience with deep material expertise and innovative sealing technologies. Proprietary processes such as FACT® Dry Bonding and patented solution concepts help ensure outstanding sealing performance, durability, and production efficiency. Through our global presence and collaborative engineering approach, we support customers worldwide with customized solutions tailored to their specific requirements.

Engineered for Diverse High-Performance Applications

Robotics

From industrial robots to collaborative systems, reliable sealing is critical in high-speed joints and compact drive units.

Connector seals support smooth, efficient operation by reducing friction and protecting sensitive components from contamination - while enabling compact, integrated designs.

Energy Storage

Modern battery systems demand high reliability, advanced thermal management, and robust protection against environmental influence.

Connector seals enable integrated sealing and electrical functionality - supporting compact battery pack designs and improved system safety.

Power Tools

In portable and high-performance power tools, durability and compactness are essential.

Connector seals help ensure long-lasting performance under vibration, dust, and harsh environments - while reducing component complexity.

Agriculture and Recreational

Agricultural machinery and recreational vehicles operate in challenging environments where dust, mud, moisture, vibration, and temperature fluctuations are constant factors.

ConnectorSeals help protect critical electrical connections while supporting durable, compact designs that enhance reliability and performance in the field.

Automotive

From electrified powertrains to advanced vehicle electronics, automotive systems require robust, scalable sealing solutions.

Connector seals support next-generation architecture by combining sealing, electrical performance, and manufacturability for high-volume production.

Engineered with Proven Materials and Technology

  • Broad material portfolio (EPDM, FKM, silicone, TPE)
  • FACT® bonding technology for strong adhesion and weldability
  • Designed for integration into existing manufacturing processes


Developed in close collaboration with customers, ensuring real-world performance and scalability.

Explore the Full Potential of Connector Seals

Learn how to reduce complexity, improve performance, and accelerate your development process with integrated connector sealing solutions.

  • Detailed technical features and materials
  • Application-specific design examples
  • Performance and reliability benefits
  • Integration and manufacturing insights
Download the Solution Sheet
Freudenberg Sealing Technologies - Technical Manual