Single-Seal Spacers
Simplify window glazing while improving IGU performance
Single seal spacers from Quanex are designed to streamline modern window glazing systems by integrating sealing, moisture control, and structural performance into one engineered solution.
Unlike traditional systems that require multiple sealing steps, a single-seal spacer eliminates the need for secondary sealant application, helping insulating glass manufacturers improve efficiency while delivering consistent, long-lasting performance.
What is a single seal spacer in window glazing?
A single seal spacer is an all-in-one component used in window glazing systems that combines sealant, desiccant, and structural elements into a single pre-engineered product.
This design simplifies the insulating glass assembly process while maintaining strong thermal and durability performance.
Key benefits for window glazing applications:
- Fewer manufacturing steps
- Faster IGU production
- Reduced opportunity for human error
- Consistent, repeatable sealing performance
In traditional window glazing processes, multiple steps, especially manual sealant application, can introduce variability from one IG unit to the next. Even small inconsistencies in sealant depth or application can impact long-term performance, leading to issues like gas loss or premature seal failure.
How we solve it:
Single seal spacers are pre-engineered with integrated sealants and components, helping standardize the assembly process. This reduces reliance on operator technique and helps deliver more consistent, repeatable results across every unit produced.
Applying secondary sealants and managing multiple materials adds time and complexity to the manufacturing process. For high-volume producers, these extra steps can limit throughput and increase labor demands.
How we solve it:
By eliminating the need for a secondary seal, single-seal spacers simplify production workflows. Fewer steps mean faster cycle times, improved line efficiency, and the ability to scale output more effectively.
Poorly insulated window glazing systems can allow interior glass temperatures to drop, leading to condensation buildup. This not only obstructs visibility but can also contribute to mold growth and damage surrounding materials.
How we solve it:
Warm-edge single seal spacers help improve edge-of-glass temperatures, reducing the likelihood of condensation forming. Integrated moisture management components further protect the IG unit over time, supporting clearer views and healthier indoor environments.
The edge of the glass is one of the most vulnerable areas for heat transfer in a window system. Inefficient spacer systems can contribute to higher U-factors, reducing the overall energy performance of the window.
How we solve it:
Single seal warm-edge spacers are designed to minimize heat transfer at the glass edge, helping improve the overall thermal performance of the window glazing system and support energy-efficient designs.
Why Single Seal Spacers Improve Window Glazing Performance
Simplified Manufacturing
Single seal spacers reduce the complexity of IGU assembly by eliminating secondary sealing processes, helping improve throughput and operational efficiency.
Strong Thermal Performance
Warm-edge technology helps reduce heat transfer at the edge of the glass, improving overall window glazing energy performance.
Condensation Resistance
Integrated moisture barriers and desiccants help keep glass surfaces warmer and drier, reducing the likelihood of condensation forming inside or on the glass.
Long-Term Durability
All critical components are engineered into a single system designed to perform consistently over time, even in demanding environmental conditions.
Quanex’s Single Seal Spacer Solutions for Window Glazing
Quanex offers a range of single seal spacers designed to support different window glazing applications, from high-performance residential windows to decorative and specialty glass units.
- Duralite® – Optimized for thermal performance with a non-metal design
- Duraseal® – Designed for durability and structural strength
- Decoseal® – Engineered for decorative and specialty glazing applications
Each solution is built on the same core principle: simplifying window glazing while delivering reliable, long-term performance.
Choosing the right single seal spacer can have a significant impact on your window glazing performance, manufacturing efficiency, and long-term product reliability.
Whether you’re optimizing an existing process or evaluating new spacer solutions, our team can help you identify the right approach based on your specific application, production setup, and performance goals. You can expect guidance on selecting the right single seal spacer for your application, insights on improving IGU production efficiency, recommendations to enhance thermal performance and durability, and support for both standard and specialty window glazing projects.
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Q: What is window glazing?
A: Window glazing refers to the glass and sealing system used in a window, including insulating glass units and components like spacers that impact energy performance and durability.
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Q: What is a single seal spacer?
A: A single seal spacer is an all-in-one component used in window glazing systems that integrates sealant, desiccant, and structural elements into one product.
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Q: Are single seal spacers energy efficient?
A: Yes. Warm-edge single seal spacers help reduce heat transfer and improve overall window energy performance.
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Q: Can single seal spacers be used in both windows and doors?
A: Yes, they are commonly used in residential window and door applications.
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Q: When are single seal spacers the right choice for a window or door manufacturer?
A: They are ideal for manufacturers looking to simplify production, improve consistency, and maintain strong thermal and durability performance.