The revolutionary glass-ceramic composition of HEATAN® provides outstanding high-temperature resistance and protection from chemical corrosion, while offering a simpler sealing process to improve efficiency and cost-effectiveness.

Key Properties of HEATAN®

Long-term durability

With thermal cycling stability of up to 300.000 km (180,000 miles), HEATAN® demonstrates excellent suitability for use in automotive systems.

Superior gas-tightness

Glass-ceramic sealing achieves a leak rate of less than 10⁻⁸ mbar l/s, even at very high operating temperatures over 300°C.

Keeping corrosion at bay

The corrosion-resistant properties of HEATAN® offer protection from the effects of gasoline and diesel exhaust gas, and exhaust fluid products such as AdBlue.

Outstanding electric insulation

With insulation of over 10¹² Ohm*cm at room temperature, current can be tightly controlled by HEATAN®.


Combining the advantages of glass and ceramics

SCHOTT’s revolutionary glass-ceramic sealing technology combines the best of both material worlds: the“glassy” part of the material enables a direct seal with metal or ceramics. The “ceramic” part gives it the high-temperature edge.



During the “glassy phase” of the sealing process, the glass-ceramic sealant can form a direct seal with ceramic substrates or metal conductor pins. Direct sealing means that an extended creepage distance can be achieved without any additional interface or soldering materials. This increases the reliability of the seal considerably.


The subsequent “ceramizationphase” of the sealing process leads to superior mechanical stability at extreme temperatures. In comparison to other sealing materials (typically used in applications from -40°C up to 300°C), glass-ceramic sealing offers superior gas-tight insulation even at very high operating temperatures from 300°C upwards and peak temperature of higher than 1000°C and/or in extreme harsh environment conditions (e.g. exhaust fumes).


Technical specification chart: 

Temperature resistance > 1000oC (1832°F)
Thermal cycling stability up to 300.000 km (180,000 miles)
Corrosion resistance Gasoline & diesel exhaust gas, AdBlue
Electric insulation > 1012 Ohm*cm at room temperature
Gas-tightness / hermeticity < 10-8 mbar l/s


Tested material combinations

Technical material combinations chart: 

Housing / outer sheath:

  • Ferritic highly-corrosion resistant steel: 1.4742, 1.4755, 1.4760, 1.4762
  • Inconel steel (Alloy 600, Alloy 601, Alloy 625, X-750)
  • Stainless steel
  • Ceramics: Al2O3, ZrO2, Fosterite, YS

Pin / electrical conductor / sensing element:

  • Ferritic highly-corrosion resistant steel: 1.4742, 1.4755, 1.4760, 1.4762
  • Kanthal heat wires
  • Ceramics: Al2O3, ZrO2, Fosterite, YSZ

SCHOTT as a supplier

Based on decades of experience in automotive sensor feedthroughs and high-temperature glass-ceramic technology, SCHOTT offers innovative custom designs and engineering support.

SCHOTT is a world-leading specialty glass expert with more than 130 years of history and innovation.

Our in-house expertise and production capabilities cover all essential and quality-critical processes of the value chain:

  • Technical development and consulting regarding feedthrough and housing designs as well as selection of suitable material combinations depending on customer requirements
  • Development of high-performance glasses and glass-ceramics
  • Processing of glasses and glass-ceramics
  • Metal selection and processing
  • Electroplating / Coating
  • Simulations and quality testing
  • SCHOTT is a world-leading supplier of gas-tight feedthroughs and housing components for harsh-environment applications since the 1930s
  • Our technology expertise includes: glass-to-metal sealing, ceramic-to-metal sealing, glass- ceramic-to-metal sealing and multilayer ceramic technologies

Want to know more? Let’s talk

Whether you need more information, samples, a quote, or advice for a project, I would be delighted to talk to you.

Contact us
Man in glasses in business office on phone while working on laptop_605x350.jpg