Trusted
We’ve earned an excellent reputation
Windows & Doors
Schlegel supplies Q-LON, brush pile and extruded weatherseals for PVC-U, aluminium and timber windows and doors worldwide.
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Wall Panels & Partitions
Q-LON gaskets from Schlegel deliver airtight, fire-rated and acoustically tested sealing for insulated wall panels and glazed partition systems.
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Vehicles & Marine
Schlegel supplies precision gasket seals for buses, trains, yachts and construction vehicles, backed by a 10-year product guarantee.
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HVAC Systems
High-performance Q-LON gaskets for HVAC ductwork, blower units, outdoor enclosures and refrigeration systems — built for demanding commercial and industrial applications.
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Specifiers
Technical data sheets, certifications, product guarantees and custom design support for specifiers working with sealing solutions across construction and manufacturing.
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Fabricators & Distributors
Distributions of Schlegel Q-LON, brush pile and extruded seals, held in stock and available in smaller quantities for fabricators, installers and homeowners.
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Why choose Schlegel seals?
Schlegel products are specified by window and door fabricators across Europe and Oceania because every seal in the range is backed by verifiable performance data, UK manufacturing, and over 140 years of weatherseal expertise. Q-LON polyurethane foam seals deliver the lowest thermal conductivity on the market at 0.04 W/m·K, three to six times better than other gasket materials.
Performance
We manufacture quality products such as Q-LON
Service
Bespoke service and product customisation available
Expertise
Made in the UK with our unique manufacturing processes
Heritage
Over 140 years experience means we are the original high-performance seals provider
Choice
We offer an extensive product range
Local presence
We supply to customers across both Europe and Oceania
Resources
We are part of the global Quanex family
Peace of mind
We are a trusted business partner
Latest News
Keep up to date with Schlegel news and product updates.
Find out about our latest product launches, technical updates and industry news from Schlegel and the wider Quanex group.
News
BBC shines spotlight on Schlegel-backed programme inspiring future engineers
July 29, 2026
Schlegel, a Quanex company and leading manufacturer of high-performance sealing systems for windows and doors,...
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News
Quanex invests £1 million in UK manufacturing to strengthen Schlegel production capacity
July 29, 2026
Schlegel, a leading manufacturer of high-performance sealing systems for windows and doors, has seen its...
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Q-LON
More than a Seal
July 29, 2026
Driving innovation forward and supporting the future of the industry are just some of the...
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Technical information, brochures and product data sheets
Access the full Schlegel technical library including product data sheets for Q-LON, brush pile and extruded seals, downloadable brochures covering EN 12365 compliance, and installation guides for timber, aluminium and uPVC applications. All documents are available to download free of charge.