TPE foam seals (thermoplastic elastomer seals) combine the flexibility of rubber with the processing advantages of thermoplastics, resulting in highly adaptable and high-performing sealing solutions across a wide range of applications.
While commonly used in window and door systems, TPE foam seals are especially valuable in environments where water resistance, pressure performance, and material flexibility are critical.
With a closed-cell structure, TPE foam weatherseals are highly effective at preventing water penetration while maintaining consistent sealing under compression. This makes them a strong choice for applications exposed to moisture, pressure, or fluctuating environmental conditions.
Their material versatility allows for a wide range of design possibilities, enabling custom-engineered foam seals that integrate seamlessly into both standard and complex systems. In addition, TPE materials are recyclable, supporting more sustainable approaches to product development.
Globally Available, Locally Supported
TPE foam seals are manufactured within the Quanex network and are available to customers around the world. While production may vary by region, our global supply chain ensures that these high-performance weatherseals can be specified and delivered wherever they are needed.
This allows manufacturers and specifiers to maintain consistent product performance across markets without limitations based on manufacturing location.
They are commonly used in:
- Window and door systems requiring resistance to water and air infiltration
- High-performance or high-pressure applications where consistent compression sealing is critical
- Refrigeration systems and temperature-controlled environments where moisture control is essential
- Garage doors and industrial doors exposed to weather and repeated operation
- Equipment enclosures and mechanical systems requiring environmental sealing
- Custom-engineered products that require flexible, high-performance sealing solutions
Because of their ability to maintain performance under compression and resist water penetration, TPE foam seals are often selected when standard sealing materials may not provide sufficient protection.
Engineered for Integrated System Performance
TPE foam seals play a critical role in high-performance sealing systems across a variety of industries, particularly where water management and compression sealing are essential to overall system performance.
When properly integrated, they contribute to:
- Improved resistance to air and water infiltration
- Enhanced thermal efficiency and energy performance
- Long-term durability in demanding or high-moisture environments
- Consistent performance under compression and pressure
- Adaptability across a wide range of system designs and applications
Whether used in window and door systems or other demanding environments, these seals help maintain consistent protection against air, water, and environmental exposure.
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Strong Protection Against Water Infiltration
The closed-cell foam structure helps prevent moisture from entering the seal, supporting long-term performance in wet, exposed, or high-humidity environments.

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Reliable Sealing Under Pressure
TPE foam maintains consistent compression, making it well-suited for applications where tighter seals and higher design pressures are required.

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Flexible Design for Complex Systems and Versatile Industries
These seals can be engineered into a wide range of shapes and profiles, allowing them to perform effectively across different window and door designs from fenestration systems to refrigeration, industrial, specialty applications, and more.

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Improved Energy Efficiency and Comfort
By limiting air leakage, TPE foam weatherseals help improve thermal performance and reduce drafts, supporting a more comfortable indoor environment.

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Recyclable Material Composition
As a thermoplastic elastomer, TPE supports recyclability while still delivering the performance characteristics needed for demanding applications.

Choosing the right foam weatherseal can significantly impact water resistance, energy efficiency, and long-term system performance. Our team works closely with manufacturers, OEMs, and specifiers to identify the best TPE foam sealing solution for each application.
Quanex also offers weatherseal solutions that meet recognized fire and safety standards for use in rated assemblies, supporting compliance in safety-critical applications.
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