Duraseal® Warm Edge Spacer

Durable and consistent performance for residential insulating glass

Duraseal^® is a premium warm-edge spacer system from Quanex, designed specifically for residential dual- and triple-pane insulating glass (IG) units. Featuring a metal shim, Duraseal offers added structural support and reliable handling for manufacturers, while still delivering a smooth edge-of-glass finish for homeowners. As a preassembled IG spacer system, it combines spacer, sealant, and desiccant into a single solution, making residential window production faster and more consistent.

Best for:

Residential dual- and triple-pane windows
Replacement and new construction windows where consistency and durability matter
High-volume residential IG production lines
Applications where smooth sightlines and energy efficiency are priorities

Duraseal^® excels in residential window applications where durability, thermal performance, and ease of production are essential. This IG spacer system is particularly well-suited for residential dual- and triple-pane windows with visible sightlines, high-volume replacement window projects, and new residential construction that emphasizes comfort and energy efficiency. It is also an ideal solution for manufacturers who require a consistent, durable, preassembled spacer system.

Why Choose Duraseal^®

Structural strength with metal shim construction
Duraseal’s metal core adds support and handling stability, helping manufacturers maintain consistent quality in every IG unit.

Designed for efficient residential production
Preassembled with sealant and desiccant, Duraseal integrates seamlessly with modern IG manufacturing equipment and requires minimal compression.

Smooth appearance with reliable performance
Ensures clean sightline and a professional finish for visible-edge residential windows, without sacrificing thermal efficiency.

Moisture and gas retention you can trust
Proven adhesive technology and high-performance desiccant maintain argon retention, improve condensation resistance, and ensure long-term comfort in homes.

Benefits of Duraseal^®

FOR MANUFACTURERS:

Preassembled metal-based spacer system for reduced handling and consistent quality
Streamlined residential IG production with fewer steps
Reliable performance in every unit for consistent throughput

FOR END USERS:

Smooth sightlines and professional appearance for visible-edge windows
Improved edge-of-glass warmth and comfort
Reduced condensation and long-lasting energy efficiency

Built for Proven Performance

Duraseal^® is part of the Quanex family of single seal warm edge spacer systems—delivering dependable, high-performance solutions across residential insulating glass applications.

Looking to produce durable, high-quality residential IG units with a warm edge spacer system that supports consistent handling?

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