Composites are synthetics made up of two or more materials with diverse physical and chemical properties that are kept separate at a macroscopic level even in a compact finish.

Although the use of modern composites started a few decades ago (with the development of fibreglass), more primitive forms of composites have been used for thousands of years. Remember that adobe is basically a mix of clay, sand and straw, a mixture that has allowed for the construction of buildings as long-lasting as the pyramids, using materials that, separately, offer insufficient physical properties. Even nature has created its own composites, like wood, that comes from the mix of cellulose fibres and lignin, creating a material with unique properties.

Sectors like the aeronautical sector have driven the development of the most modern composites allowing for the creation of materials with a very high resistance/weight ratio which means much lighter structures, resistant to heat and corrosion as well as having unique thermal and electric insulation properties.


The materials included in the Glastech family deserve special mention. These composites, based on fiberglass, have been developed to comply with the requirements of the reference standard in the railway sector EN 45545-2. For more detailed information, visit the page about Glastech, railway sector insulating materials.

All the Composites

Electric insulators

  • Glastech ETH-160
  • Glastech ETH-180
  • Glastech FTH
  • Fiberglass + epoxy resin
  • Cotton fabric + phenolic resin
  • Kraft paper fabric + phenolic resin
  • Matt glass + polyester resin

Thermal insulators

  • Hard cement without asbestos
  • Mica
  • Bioceramic
  • Carbon fiber