Business Details
47 Years
experience
Your Trusted Source for Insulated Glass Components
Thermoseal Group is a multiple award-winning organisation with over 40 years of experience in manufacturing and supplying high-performance components for insulated glass (IG) sealed units. Founded in 1979, we have grown to become the UK's largest specialist IG component manufacturer and distributor, supplying over 2,500 products globally. Our core offerings include Thermobar and Thermoflex Warm Edge Spacers, which are Passive House-approved and achieve the highest thermal efficiency ratings. We also produce decorative glass solutions such as DecraLed and DecraGlow to enhance architectural aesthetics. With operations across four UK sites and exports to 40 countries, we combine in-house innovation with ISO 9001:2015-certified quality control.Our vision is to lead the global market in energy-efficient glazing solutions, supported by a dedicated team and a commitment to reinvesting profits into research and development. We serve sealed unit manufacturers, window fabricators, and architects, providing technical expertise and machinery for double, triple, and quadruple glazing systems. Our focus on reducing energy loss through advanced warm edge technology aligns with global sustainability goals, while our customer-centric approach ensures tailored support for every client. As part of the Fenzi Group since 2024, we continue to expand our capabilities in glass processing solutions.
Services
Warm Edge Spacers
Desiccants
Sealants
Decorative Glass Products
Glass Machinery
Details
- Year established: 1979
Highlights and features
- We have over 40 years of experience in insulated glass component manufacturing.
- Our Thermobar and Thermoflex spacers are Passive House-approved for Arctic climates.
- We manufacture 50% of our product range in-house for quality control.
- Our ISO 9001:2015 certification ensures rigorous quality management standards.
- We export to 40 countries across six continents with direct distribution networks.
Associations and certifications
- ISO 9001:2015
Services
Warm Edge Spacers
Our Thermobar and Thermoflex warm edge spacers reduce heat loss by up to 94% at window edges, enhancing thermal efficiency. These Passive House-approved components are designed for Arctic climates and triple glazing systems. Manufactured to ISO 9001:2015 standards, they ensure compliance with EN1279 for gas-filled units.
Desiccants
Eurosiv desiccants adsorb moisture within sealed units, preventing condensation and maintaining clarity. Our 3A-grade beads are compatible with argon, krypton, and xenon gas fills. Automated dispensers ensure precise application for long-term unit integrity.
Sealants
We supply dual-seal systems including Euroseal PIB and hot melt sealants. These products meet European standards for moisture vapour transmission and gas retention, critical for Window Energy Ratings. Application machinery ensures consistent, durable bonds.
Decorative Glass Products
DecraLed self-adhesive lead strips and DecraGlow films create stained-glass effects without traditional costs. Our Wigan-based design studio offers bespoke patterns, electroplated finishes, and powder-coated options for residential and commercial projects.
Glass Machinery
Thermoseal Group Equipment (TGE) includes hot melt extruders, gas fillers, and desiccant dispensers. Our machinery supports EN1279 certification, enabling manufacturers to achieve C+ Window Energy Ratings and comply with EU gas-retention standards.
Questions
What are warm edge spacers?
Warm edge spacers reduce heat transfer at window edges by up to 94%, improving thermal efficiency and lowering energy bills.
How do desiccants work in sealed units?
Desiccants adsorb moisture inside sealed units, preventing condensation and maintaining clarity over the window's lifespan.
Are Thermoseal products ISO certified?
Yes, our manufacturing processes comply with ISO 9001:2015 quality management standards.
Can I get Thermoseal products internationally?
We export to 40 countries across six continents, with direct distribution from our Wigan manufacturing site.
What machinery do you supply for IG units?
We offer hot melt extruders, gas fillers, desiccant dispensers, and complete production lines for sealed unit manufacturing.
Do you provide technical support?
Yes, our team offers guidance on product selection, EN1279 compliance, and machinery operation for optimal results.
