Schlegel Q-Lon

Schlegel Q-Lon is a weatherstripping seal system that features a polyurethane foam core, providing excellent thermal insulation for windows and doors. This foam core is wrapped in a durable, weather-resistant outer shell. The design ensures the seal maintains its compression recovery over a long period of use.

Q-Lon seals are manufactured by Schlegel, a German company widely recognized in the window and door manufacturing industry. They developed the product to provide high-performance thermal insulation while maintaining structural integrity over time. The Schlegel Q-Lon system is a standard choice for many premium window fabricators worldwide.

The polyurethane foam core provides excellent thermal insulation while maintaining superior compression recovery over time. This means the seal bounces back to its original shape after the window or door is repeatedly opened and closed. It ensures a consistent, draft-blocking barrier throughout the product's lifespan.

These seals are widely used in window and door manufacturing to prevent drafts, moisture, and noise from entering a building. They are particularly favored in high-end residential and commercial glazing applications due to their durability and thermal efficiency. The Q-Lon system can be applied to both casement and sliding window frames.