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Q. What is the Thermal Conductivity Value of Thermobar Warm Edge Spacer Tube?

Thermobar Warm Edge Spacer tube has a thermal conductivity value of 0.14W/mK on a 15.5mm airspace - with or without its gas barrier tape. This is the value as per IFT-Rosenheim physical testing (this includes desiccant and PIB). There is a BuildCheck Data Sheet downloadable on the our website, certifying this figure. 

Thermobar is also Passive House approved and offers a phA rating for Arctic Climates (phA+ with Hot Melt secondary sealant).  

We are proud to have manufactured our own British-made product which offers one of the best thermal performances available worldwide.

Q. Is Thermobar Warm Edge Spacer bendable?

Yes. However, as Thermobar is made with an engineering plastic, it needs heat to bend. This can be manually bent using a heat source, or bent using automated bending machines. With Thermobar, it is important that it works using traditional automated bending machines, as well as the new ones entering the market, so we work with a wide range of warm edge bending machine suppliers to optimise the speed that the product bends and maximise output.

Q. What is Thermobar Warm Edge Spacer?

Thermobar Warm Edge Spacer System is a rigid tube spacer system made with engineering plastic.  It has a unique gas/moisture barrier tape. It is one of two warm edge spacer systems we manufacture in-house. Thermobar and Thermoflex both offer highest thermal performance and are the result of Thermoseal Group’s 39-plus years of dedication to insulated glass.

Thermobar is currently available in black, grey and white in profile widths: 4mm, 7.5mm, 9.5mm, 11.5mm, 13.5mm, 15.5mm, 17.5mm, 19.5mm, 21.5mm and 23.5mm. We supply these in boxes or large stillages of 8,000m.  Our box quantities have been developed in response to customer feedback.  For the full range, click here.

We also supply a wide range of bespoke fittings for Thermobar, many of which are injection moulded in our own injection moulding division.  Fittings include:  Standard Corner Keys; Gas Corner Keys; Gas Collars and Plugs; Flexi Keys; Straight Connectors. Also fittings to simulate multipane windows including Duplex Centre and Edge Keys and Interbar and Fittings.

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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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