The solid alternative to aluminium

If you're looking for stability and "raw strength" for fire-resistant glass and exceptionally large windows, then FERROTECH is the answer.

FERROTECH is suitable for use with corner keys and bending in all known bending machines. It fulfils all the requirements for the production of fire-resistant glass.

The traditionally framed spacer delivers optimal durability through 6.5 mm of galvanised steel and an exceptional stability when compared to aluminium spacers – particularly in the production of larger units.

The thermal conductivity of steel is also less than that for aluminium, and this gives a "warmer edge" to the thermal glazing. The thermal expansion coefficient of glass and steel are very similar, and in contrast to aluminium, this makes for a more uniform structure, when hot and cold temperatures activate the thermal glazing.

We are happy to paint the visible surface, flanges and the uppermost 2 mm of the butyl side in whichever RAL and NCS colours you desire.

The unbending facts

  • 6.5 mm galvanised steel
  • The optimal solution for fire-resistant glass and large windows
  • We also stock corner keys, model corner keys and connectors
  • Can be delivered pre-assembled with open connectors



Fill out the form.

We will return as soon as possible.

Name: *
Phone no.: *
E-mail address: *
Which product are you interested in? *
Please make sure all required fields are filled out correctly

Our surroundings

Below please find pictures of our premises and the machines that we are working with every day.

For further details please click the pictures.

About Rolltech A/S

Welcome to ROLLTECH:

the world's leading producer of

spacers for the glass industry,

and your supplier of advice,

information and the right solution

to match precisely your needs.

We are part of GLASS ALLIANCE

​– the world's largest supplier of spacers and window sealant for the insulating glass industry – together with Fenzi and our parent company, Alu-Pro.

This is your guarantee of a total supplier with complete know-how, experience and knowledge of current developments.

Contact us

​Johs. E. Rasmussens Vej 12

DK-9800 Hjørring


SE-nummer (eksport):DK 23163853

SEnummer (import):DK 78322519

Phone: +45 96 23 33 43

E-mail: info@rolltech.dk