Made in the UK
British-manufactured seals built to perform
Q-LON Seals
- Polyurethane foam core with polyethylene liner
- Tested to perform after 10,000 opening/closing cycles
- Thermal conductivity of 0.04 W/m·K at 0°C
Find Out More
Brush Pile Seals
- UV stable and chemically inert for lasting performance
- Woven and extruded base options
- Backed by a 10-year guarantee
Find Out More
Extruded Seals
- TPE, EPDM and polypropylene profiles
- Rigid extrusions and combination seals available
- Certified to BS EN 12365
Find Out More
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.
Trusted
We’ve earned an excellent reputation
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
Seals for every application
Schlegel supplies weatherseals for timber, aluminium and uPVC windows and doors across residential, commercial and industrial construction. Products are also specified in the window covering, interior design and industrial sectors, including anti-static applications in copier and cash handling equipment.
Our seal ranges: Q-LON, brush pile and extruded
Q-LON is Schlegel's polyurethane foam gasket, made with a special foam core and weather-resistant polyethylene liner, available for timber, aluminium and uPVC frames. Q-LON Fire Retardant profiles are classified to EN 13501-1 Class E. Brush pile seals, made from polypropylene with optional silicone treatment, seal against moving elements and uneven surfaces. The extruded seal range combines TPE, foamed TPE, polypropylene and silicone profiles for fenestration, window covering and industrial applications.
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,...
Find Out More
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...
Find Out More
Q-LON
More than a Seal
July 29, 2026
Driving innovation forward and supporting the future of the industry are just some of the...
Find Out More
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.