Dual-Seal Insulating Glass Spacers
High-Performance Warm-Edge Spacer Systems for Durable, Energy-Efficient IG Units
Super Spacer® dual-seal systems from Quanex are engineered to help window and door manufacturers produce high-performance insulating glass (IG) units with exceptional durability, thermal efficiency, and long-term reliability.
Unlike traditional metal spacers, Super Spacer® features an all-foam, no-metal construction that minimizes thermal transfer at the edge of the glass, helping improve overall window performance while supporting consistent manufacturing outcomes. Designed for both residential and commercial applications, Super Spacer systems provide the flexibility to meet a wide range of performance and design requirements.
From everyday window systems to large-scale architectural glazing, Super Spacer® dual-seal technology delivers the performance manufacturers and specifiers depend on, and the comfort homeowners expect.
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Advanced Thermal Performance
The Super Spacer product’s all-foam composition creates a highly effective thermal barrier at the edge of the glass, one of the most critical areas for heat transfer.
This warm-edge design helps:
- Improve overall U-factor performance
- Reduce heat loss at the edge of the unit
- Support ENERGY STAR®-aligned window system designs
Compared to traditional metal spacers, Super Spacer® systems can maintain significantly warmer edge-of-glass temperatures under cold conditions.
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Improved Condensation Resistance
By maintaining warmer glass edge temperatures, Super Spacer® helps reduce the likelihood of interior condensation forming on windows. This not only improves visibility and aesthetics but also helps minimize the potential for moisture-related issues such as mold or mildew, benefiting both building performance and occupant health.
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Build for Real-World Conditions
Super Spacer® dual-seal systems are designed to perform in demanding environments, including:
- Side temperature fluctuations
- High humidity conditions
- Prolonged UV exposure
All Super Spacer® products are tested to withstand extreme conditions, including industry-recognized durability testing that simulates long-term field performance.
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Acoustic Performance Benefits
The foam-based construction of Super Spacer® also contributes to improved sound dampening compared to traditional metal spacers, helping reduce noise transmission through the window system.
Designing and manufacturing high-performance insulating glass units comes with challenges, from durability concerns to thermal inefficiencies. Super Spacer® dual-seal systems are engineered to help address these issues at both the manufacturing level and in real-world building performance. Here are some common challenges that window and door manufacturers run into with insulating glass units, why those challenges occur, and how Super Spacer from Quanex can help.
Why it happens:
Rigid spacer systems and temperature fluctuations can create stress within the IG unit, leading to seal degradation over time.
How Super Spacer helps:
The flexible, all-foam construction expands and contracts with temperature changes, reducing stress on the seal and helping extend the life of the insulating glass unit.
Why it happens:
Traditional metal spacers conduct heat and cold, creating a thermal bridge at the edge of the glass.
How Super Spacer helps:
The no-metal foam design significantly reduces thermal conductivity, helping maintain warmer edge-of-glass temperatures and improving overall window performance.
Why it happens:
Cold glass edges caused by conductive spacers increase the likelihood of condensation forming indoors.
How Super Spacer helps:
Warmer edge temperatures reduce condensation risk, helping maintain clearer glass and a healthier indoor environment.
Why it happens:
Inefficient spacers contribute to energy loss, forcing HVAC systems to work harder to maintain indoor comfort.
How Super Spacer helps:
By improving thermal performance at the edge of the glass, Super Spacer helps reduce energy loss, supporting more efficient window systems and improved indoor comfort.
Why it happens:
Variability in materials and spacer performance can lead to inconsistencies in finished units.
How Super Spacer helps:
Engineered for consistency, Super Spacer® supports repeatable manufacturing processes and reliable long-term performance across production runs.
Why it happens:
Changes in temperature, pressure, and environmental conditions can create stress within rigid IG systems.
How Super Spacer helps:
The foam spacer’s ability to flex and return to shape helps absorb movement, reducing the risk of stress-related issues.
Why it happens:
Rigid materials can transmit sound more easily through the glazing system.
How Super Spacer helps:
The foam composition helps dampen sound, contributing to improved acoustic performance.
Benefits for Manufacturers
Super Spacer dual-seal systems are designed not only for performance in the field, but also for efficiency and consistency in the manufacturing process.
- Flexible material design helps accommodate movement during production and installation
- Reduced stress on seals can contribute to improved long-term unit reliability
- Consistent spacer performance supports repeatable, high-quality IG unit fabrication
- Versatile product family allows manufacturers to address both residential and commercial applications with a unified technology platform
Benefits for Building Occupants & Homeowners
While performance starts in manufacturing, the benefits of Super Spacer® extend throughout the life of the window or door system:
- More consistent indoor temperatures and improved comfort that can lower heating and cooling costs
- Reduced condensation for clearer views
- Enhanced energy efficiency
- Improved durability and long-term performance
Designed for a Wide Range of Applications
- Residential windows and patio doors
- Commercial curtainwall and storefront systems
- Large-format and high-performance glazing applications
- Projects in extreme or demanding climates
With multiple product configurations available, manufacturers and specifiers can select the right Super Spacer® solution to meet the specific performance, design, and production requirements of their project.
The Super Spacer® Product Line
Quanex offers a complete portfolio of Super Spacer® dual-seal solutions to support a wide range of insulating glass applications.
- Super Spacer® Premium
- Super Spacer® Premium Plus
- Super Spacer® TG Thin Glass
- Super Spacer® Cushion Edge
- Super Spacer® T-Spacer™
- Super Spacer® TriSeal™
Each product is engineered using the same core foam spacer technology, with variations in profile, configuration, and application focus, allowing manufacturers to choose the right solution for their specific needs.
Super Spacer® represents a modern approach to dual-seal insulating glass design, combining the durability of dual-seal construction with the thermal advantages of a no-metal, foam-based spacer. The result is a system that helps manufacturers produce high-performance IG units more reliably, while delivering measurable benefits to building occupants over time.
Looking to improve insulating glass performance or specify a dual-seal spacer system for your next project?
Connect with Quanex to learn how Super Spacer® can support your manufacturing process and performance goals.
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Q: What is a dual-seal insulating glass spacer?
A: A dual-seal insulating glass spacer systems uses two sealing components to create a durable barrier between glass panes. This design helps improve long-term performance by enhancing resistance to moisture ingress, gas loss, and environmental stress compared to single-seal systems.
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Q: What makes Super Spacer® different from traditional spacers?
A: Super Spacer® features a no-metal, all-foam construction that reduces thermal conductivity at the edge of the glass. Unlike traditional metal spacers, it helps maintain warmer edge temperatures, improving energy efficiency, reducing condensation, and supporting long-term durability.
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Q: Why are warm-edge spacers important for windows and doors?
A: Warm-edge spacers help reduce heat transfer at the edge of glass, one of the most vulnerable areas in a window system. By improving thermal performance in this area, they help enhance overall energy efficiency, increase indoor comfort, and reduce the likelihood of condensation forming on the glass.
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Q: Can Super Spacer® be used in both residential and commercial applications?
A: Yes. The Super Spacer® product family includes multiple configurations designed to support a wide range of applications, from residential window and door systems to large-scale commercial and architectural glazing projects.
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Q: How does Super Spacer® help reduce condensation on windows?
A: Condensation forms when interior air meets a cold glass surface. Super Spacer® helps keep the edge of the glass warmer by reducing heat transfer, which lowers the likelihood of condensation forming, helping maintain clearer views and a more comfortable indoor environment.