Thermoseal Group
Thermoseal Group is the largest UK specialist manufacturer and distributor of insulated glass sealed unit components, supplying over 2,500 products including proprietary warm edge spacers, sealants, desiccants, and decorative glazing accessories to a worldwide customer base.
- Company typePrivate
- Founded1979
- HeadquartersBirmingham, United Kingdom
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Thermoseal Group does
Thermoseal Group Limited, headquartered in Birmingham, United Kingdom, is the largest UK specialist manufacturer and distributor of insulated glass (IG) sealed unit components, supplying over 2,500 SKUs to a worldwide customer base. The company manufactures over 50% of the components it supplies in-house, with a product portfolio centered on warm edge spacer technology — proprietary brands Thermobar and Thermoflex — designed to minimize thermal energy loss in double, triple, and quadruple glazing units. The range extends to aluminium and steel spacer bars, Euroseal PIB and hot melt sealants, Eurosiv molecular sieve desiccants, Georgian and Victorian decorative systems, the DecraLed decorative portfolio (lead strips, films, bevels, fused tiles), adhesive tapes, corner keys and connectors, and Thermoseal Group Equipment (TGE) glass machinery and parts. The company holds ISO 9001, CE Marking (EN 14351-1), EN 1279, Passive House Component, Qualicoat, and CEBTP certifications.
Thermoseal Group firmographics
Firmographics- Name
- Thermoseal Group
- Legal name
- Thermoseal Group Limited
- Website
- https://thermosealgroup.com
- Company type
- Private
- Founded year
- 1979
- Operating status
- Acquired
- Headcount range
- 11–50 employees
- Short description
- Thermoseal Group is the largest UK specialist manufacturer and distributor of insulated glass sealed unit components, supplying over 2,500 products including proprietary warm edge spacers, sealants, desiccants, and decorative glazing accessories to a worldwide customer base.
- Ownership category
- akta.pro rank
Thermoseal Group industry classification
Industry- Product category
- Insulated Glass Components Manufacturing
- NAICS
- Glass Product Manufacturing Made of Purchased Glass (327215)
- SIC
- Glass Products, Made Of Purchased Glass (3231)
- akta.pro primary industry
- Glazing Hardware, Sealants & Accessories (Spacers/Gaskets/Setting Blocks) (IMADAHAJ)
- akta.pro secondary industry
- Insulating Glass Units (IGUs) & Double/Triple Glazing (IMADAHAC)
Keywords
Where Thermoseal Group is headquartered
LocationHeadquarters
- HQ city
- Birmingham
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
Thermoseal Group business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Operations, Supply Chain, Personnel, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- IG Component Sales: Sale of insulated glass components including spacer bars, sealants, desiccants, Georgian/Victorian systems, decorative products, tapes, tools, and machinery parts. The company manufactures over 50% of the 2,500+ components it supplies.
- Equipment Sales: Sale of Thermoseal Group Equipment (TGE) for manufacturing IG sealed units including glass machinery and parts.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Monthly | Business customer pricing with credit account terms |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels5 records
Thermoseal Group product offering
Product offeringCore offering
Thermoseal Group is the largest UK specialist insulated glass (IG) component manufacturer and distributor, supplying over 2,500 components for manufacturing IG sealed units (double, triple and quadruple glazing). The company manufactures over 50% of the components it supplies, with proprietary brands including Thermobar and Thermoflex warm edge spacers, Euroseal sealants, Eurosiv desiccants, and the DecraLed decorative product range. Its offering covers everything required for high performance glazing except the glass itself, sold to sealed unit manufacturers, window fabricators, contractors, and trade distributors worldwide.
Product overview
Thermoseal Group is the largest UK specialist insulated glass (IG) component manufacturer and distributor, supplying over 2,500 components and Thermoseal Group Equipment (TGE) for manufacturing IG sealed units (double glazing, triple glazing, or quadruple glazing). The company manufactures over 50% of the components they supply to a worldwide customer base. Their product portfolio centers on warm edge technology products (Thermobar and Thermoflex warm edge spacers) for thermal efficiency, complemented by spacer bars in aluminium and steel, sealants (Euroseal PIB and hot melt), molecular sieve desiccants (Eurosiv), and decorative products including the DecraLed range (DecraLed lead strips, DecraGlow films, DecraBevels, and fused tiles). The offering is rounded out by corner keys and connectors, adhesive tapes, tools and ancillary items, and glass machinery.
Differentiator
Problem solved
Functional benefit
Brands
- Thermobar: Warm Edge Spacer brand for insulated glass units
- Thermoflex
- DecraLed
- DecraGlow
- DecraBevels
Products and services
- Thermobar Warm Edge Spacers
- Thermoflex Warm Edge Spacers Flexible warm edge spacers offering high performance for sealed unit manufacturers, designed to improve thermal efficiency in double and triple glazing applications.
- Aluminium Spacer Bars Aluminium spacer bars available in various sizes (4mm to 19.5mm) and profiles (standard and bendable) for sealed unit manufacturing.
- Steel Spacer Bars Steel spacer bars providing structural integrity for insulated glass sealed units, offered in standard sizes.
- Euroseal PIB Sealants Premium PIB (polyisobutylene) sealants for insulated glass sealing applications, available in black and premium formulations.
- Euroseal Hot Melt Sealant Hot melt sealant products for insulated glass secondary sealing applications.
- Eurosiv Molecular Sieve Desiccants Molecular sieve desiccant products specifically formulated for insulated glass sealed units to prevent condensation and maintain dry gas fill in IG units.
- Georgian and Victorian Decorative Systems Decorative bar systems including Georgian bars and Victorian grilles in multiple sizes for achieving authentic window aesthetics in residential and commercial glazing.
- DecraLed Decorative Products Range Decorative product range including DecraLed self-adhesive lead strips, DecraGlow films, DecraBevels, fused tiles, and DecraBond adhesive for achieving authentic stained glass effects on windows, doors and conservatories.
- Adhesive Tapes Double-sided tapes, self-wound aluminium tape, and foil tape including warm edge foil tape for spacer bar applications and sealed unit assembly.
- Corner Keys and Connectors Corner keys, connectors, and accessories for spacer bar systems including aluminium, steel, and Thermobar-specific fittings, available in various sizes for different spacer bar dimensions.
- Thermoseal Group Equipment (TGE) - Glass Machinery and Parts Thermoseal Group Equipment (TGE) including glass machinery, saws, and replacement parts for insulated glass manufacturing operations sold to sealed unit manufacturers.
- Tools and Ancillary Items Hand tools, cutting fluids, cleaning products, ProPads foam protection pads, and ancillary items for sealed unit manufacturing operations.
Quantifiable outcome
- Minimizes energy loss through windows using warm edge technology
Companies that use Thermoseal Group
Customer profileSegments6 records
Ideal customer profiles3 records
Thermoseal Group technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Thermoseal Group partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Fenzi Group SpacoreThermoseal Group has been acquired by Fenzi Group Spa, a Milan-based chemical company specializing in glass processing solutions. This acquisition represents a significant ownership change for Thermoseal Group, transitioning from an independent company to being part of the Fenzi Group.
Scale indicators4 records
Recent moves5 records
Expansion highlights5 records
Thermoseal Group competitors and assessment
Company assessmentDirect peers
- Ensinger: Ensinger produces insulbar thermoplastic warm edge spacer profiles for aluminium, wood and PVC window systems, competing directly with Thermobar warm edge spacer bars in the IG component supply chain.
- Technoform Glass Insulation: Technoform is one of the leading global manufacturers of warm edge thermoplastic spacer bars (TGI, TGI-Spacer) for IG units, competing head-to-head with Thermoseal's Thermobar range on thermal performance in commercial and residential window applications.
- Bostik (Arkema): Bostik supplies hot melt butyl and PIB sealants used as primary and secondary seals in IG units, directly competing with Thermoseal's Euroseal PIB and hot melt sealant range for the same sealed unit manufacturer customers.
- Swisspacer (Saint-Gobain): Swisspacer is a Saint-Gobain brand producing warm edge spacer bars for insulated glazing, directly comparable to Thermobar/Thermoflex. Competes on the same performance certification basis (Passivhaus, EN 1279) and across the same sealed unit manufacturer channel.
- Edgetech (a Quanex company): Edgetech manufactures warm edge spacer systems (Super Spacer) for insulated glass units, directly competing with Thermobar and Thermoflex. Operates globally and serves the same sealed unit manufacturer and window fabricator customer base as Thermoseal.
- Kömmerling (H.B. Fuller): H.B. Fuller's Kömmerling brand supplies IG sealants and warm edge-compatible chemistries, overlapping with Thermoseal's Euroseal and hot melt sealants used in insulated glass unit assembly.
- Rolltex (Alu-Pro): Alu-Pro/Rolltex manufactures warm edge spacer systems for the insulated glass industry, overlapping with Thermoseal's Thermobar and Thermoflex offerings and serving the same European sealed unit manufacturer customer base.
- Tremco (RPM International): Tremco manufactures sealants and weatherproofing products for the window and glazing industry, including products used in IG unit assembly that overlap with Thermoseal's sealant portfolio.
Broad incumbents
- Fenzi Group: Milan-based parent company of Thermoseal Group since July 2024; Fenzi produces chemicals, sealants, mirror backing paints and machinery for the global glass industry. Comparable as a broad incumbent in IG-adjacent chemistry rather than a like-for-like IG component manufacturer.
- Saint-Gobain Glass: Saint-Gobain is a global glass manufacturer and owner of Swisspacer; it sells the float glass and coated glass that go into the insulated units assembled with Thermoseal's components, making it an upstream-adjacent incumbent in the same value chain.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks5 records
Key highlights6 records
Customer concentration
Thermoseal Group social profiles
Digital presenceThermoseal Group compliance and trust
Trust signalCompliance6 records
Thermoseal Group financial estimates
Financial estimateRevenue estimate
Valuation estimate
Thermoseal Group leadership team
Management profileNumber of profiles
Profiles2 records
Thermoseal Group funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Thermoseal Group M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Thermoseal Group
What does Thermoseal Group do?
Thermoseal Group is the largest UK specialist insulated glass (IG) component manufacturer and distributor, supplying over 2,500 components for manufacturing IG sealed units (double, triple and quadruple glazing). The company manufactures over 50% of the components it supplies, with proprietary brands including Thermobar and Thermoflex warm edge spacers, Euroseal sealants, Eurosiv desiccants, and the DecraLed decorative product range. Its offering covers everything required for high performance glazing except the glass itself, sold to sealed unit manufacturers, window fabricators, contractors, and trade distributors worldwide.
Is Thermoseal Group a public or private company?
Thermoseal Group is a private company. It is classified as corporate owned and is currently acquired.
When was Thermoseal Group founded?
Thermoseal Group was founded in 1979. It employs 11 to 50 people.
Where is Thermoseal Group based?
Thermoseal Group is headquartered in Birmingham, United Kingdom, in the Europe region.
How does Thermoseal Group make money?
Two revenue lines are on record. IG Component Sales are the primary driver. The others are equipment Sales.
Who are Thermoseal Group's main competitors?
Direct peers on record are Ensinger, Technoform Glass Insulation, Bostik (Arkema), Swisspacer (Saint-Gobain), Edgetech (a Quanex company), Kömmerling (H.B. Fuller), Rolltex (Alu-Pro) and Tremco (RPM International). Broad incumbents are Fenzi Group and Saint-Gobain Glass.
Does Thermoseal Group have an API?
No public API is recorded for Thermoseal Group.
What industry is Thermoseal Group in?
Thermoseal Group's product category is Insulated Glass Components Manufacturing. Its primary akta.pro industry code is IMADAHAJ, Glazing Hardware, Sealants & Accessories (Spacers/Gaskets/Setting Blocks), with a secondary code of IMADAHAC, Insulating Glass Units (IGUs) & Double/Triple Glazing. Its NAICS code is 327215 and its SIC code is 3231.