extremglas. Multi-pane insulating glass for vehicles

Not just any glass deserves the name extreme glass. We shed light on the subject and explain which glazing we install. And what makes glazing in occupied vehicles special.


Real glass has many advantages over panes made of plastic. The only thing to consider is the higher weight of real glass. Otherwise, real flat glass is harder, more scratch-resistant, insulates well and offers a clearer view.

Safety glass must be used for installation in vehicles. There is single-pane safety glass (ESG) and laminated safety glass (VSG). In laminated safety glass, several ESG panes are bonded together with a plastic film. In the case of single-pane safety glass, the pane is thermally treated in a special process. This makes the pane more than six times tougher and more break-resistant than normal glass.

extremglas is tested for road approval

Glass stamp with approval according to ECE 43 R.

European approval laws apply to the installation of glass panes in motor vehicles in Europe. All side windows in vehicles must be tested for road traffic and bear the E mark according to the ECE R43 standard (see here: https://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:230:0119:0252:DE:PDF).

extremglas is a special production for touring vehicles. Our multi-pane glazing has been specially homologated according to ECE R43 and extensively tested in laboratory tests.

Insulating glass and thermal insulation

Insulating glazing is a composite of at least two panes. The space between the panes is filled with air and tightly sealed at the edges. Due to the lower thermal conductivity of the air in the interspace, U-values of around 3 W/(m2K) are achieved.

Heat insulating glazing is multiple-pane glass that is filled with an inert gas. Together with an invisible thermal insulation coating, U-values of around 1.5 W/(m2K) are achieved.

Argon also provides high sound insulation.

Climate loads and altitude suitability

The pressure of the (air or argon) filling between the discs is constant when filled. If the air pressure drops, e.g. when driving up a mountain, the pressure in the interspace remains the same. Since the ambient pressure decreases at the same time, the pane bulges. The resulting compressive stress on the pane is called the climatic load. Normal window glass would burst or leak at the edge.

The thermally tempered glass used for extremglas and an elastic edge seal with a state-of-the-art adhesive edge enable us to achieve maximum height stability for extremglas.

Our standard is premium.

Standard glazing in our window SKI is a total of 20mm thick multiple glazing. The two panes are made of thermally treated safety glass (ESG). A thermal protective coating and the interspace filled with 90% argon ensure excellent insulation values of Ug 1.7 W/(m2K). extremglas17 is manufactured with an elastic “warm edge” edge seal. As a result, these panes are guaranteed to withstand altitudes of up to at least 6000m.

Characteristics extremglas 17:

Light transmittance: τv [%] 75
Colour rendering index: Ra [%] 99
Thermal transmittance: Ug 1.7 [W/(m2.K)]
Solar factor : g [%] 74

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Solar control coating, tinting and more

For extreme glass17, there are several solar control coatings as an option to the thermal protective coating. The solar control coating filters the warming solar energy, but lets visible light through.

Tinting of the panes in gray, blue or bronze is possible on request.