Duralite® Warm Edge Spacers

Enhanced performance and refined aesthetics for residential insulating glass

Duralite^® is a high-performance warm edge spacer system from Quanex, engineered to improve both the appearance and thermal performance of dual- and triple-pane insulating glass units. With a polycarbonate spacer element, it provides a smooth edge-of-glass finish while helping manufacturers maintain efficient production. As a preassembled solution, Duralite combines spacer, sealant, and desiccant, making it an ideal choice for high-volume residential window production.

Best for:

Window manufacturers producing residential IG units at scale
Product lines where energy efficiency is a key selling point
Applications where a clean, smooth sightline enhances window design
Teams looking for a reliable, preassembled warm edge spacer system

Duralite^® performs best in residential applications where thermal efficiency and edge-of-glass comfort are key to overall product performance. Its polycarbonate construction makes it especially effective in window systems designed to reduce heat transfer at the glass edge, in climates where condensation resistance is a priority, and in residential designs that feature visible glass edges with clean sightline expectations. It is also well-suited for production environments focused on balancing performance with manufacturing efficiency.

Why Choose Duralite^®

Superior thermal performance with polycarbonate construction
Duralite’s non-metallic spacer reduces heat loss at the glass edge, creating warmer edges without compromising durability.

Optimized for residential production efficiency
Preassembled with sealant and desiccant, Duralite requires minimal compression and works seamlessly with modern IG manufacturing equipment.

Smooth, clean appearance
Ensures a professional finish for visible sightlines, supporting modern residential window designs and aesthetic expectations.

Reliable moisture and gas management
High-performance desiccant and proven adhesive technology maintain argon gas retention, improve condensation resistance, and enhance long-term durability in homes.

Benefits of Duralite^®

FOR MANUFACTURERS:

Streamline residential IG production with a preassembled spacer system
Reduce handling steps and maintain efficient throughput
Enhance product line appeal with improved edge-of-glass appearance

FOR END USERS:

Warmer edge-of-glass temperatures for increased comfort
Reduced condensation for clearer views and healthier indoor environments
Long-lasting thermal performance in varying climates

Built for Proven Performance

Duralite^® is part of the Quanex family of single seal warm edge spacer systems—trusted for delivering flexible, high-performance solutions that elevate residential insulating glass production and comfort in the home.

Looking to upgrade your residential window production with a warm-edge spacer system that combines performance and efficiency?

Our experts can help you determine if Duralite^® is the right solution for your next project.