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Corner Keys and Accessories

We supply the largest volume and range of spacer bar fittings to the UK market including our own manufactured Thermobar and Thermoflex Warm Edge Spacer fittings, a wide range of Aluminium Spacer Bar fittings and also Steel Spacer corner keys.  

We injection mould a wide range of bespoke fittings in our own injection moulding division where we produce approximately 10 million mouldings per year to our exacting standards.  Our full range of fittings includes: Corner Keys (standard and gas keys); Straight Connectors; Gas Collars and Plugs; Duplex Fittings; Interbar (Muntin) and Fittings.  Our injection moulding facility also manufactures a range of Georgian Fittings.

Please use the tickboxes below to refine your search for corner keys and other spacer bar fittings, then click on the image of the product you are looking for for full product information. 


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0845 331 3950
Intl: +44 121 331 3950
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Thermoseal Group

Our business is dedicated to the manufacture and supply of highest performance components and machinery used in the manufacture of insulated glass. Our particular focus Is on the development of components designed to help meet the changing requirements for more thermally efficient windows. We are a multiple award-winning organisation with almost 40 years in the industry.

Latest News

Thermoseal Group nominated as G23 'Component Supplier of the Year' Finalist
Date Added 03/10/23

Thermoseal Group is a finalist in the Component Supplier of the Year category in the G23 Awards, in recognition of its investment in infrastructure,... > More


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