Silicones for High Temperature Resistant Gaskets and Seals

silicone sealing gasket

In industrial facilities across the manufacturing, automotive, and aerospace sectors, achieving effective sealing and insulation at high temperatures is crucial. Traditional materials like rubber and organic polymers deteriorate rapidly when exposed to heat, leading to failed seals, leaks, and associated equipment damage.

This is where high performance silicone gaskets and seals come into play. Silicones can withstand continuous exposure to high temperatures up to 300°C, making them the material of choice for heat-resistant sealing applications.

What Makes Silicones Effective at High Temperatures?

Silicones are inorganic-organic hybrid polymers that possess a unique set of properties:

  • Thermal stability – Low chain mobility prevents decomposition
  • Oxidation resistance – Protects against thermal degradation
  • Low compression set – Maintains tight seal under compression
  • Flexibility – Absorbs vibration and withstands thermal expansion

These capabilities allow quality silicone gaskets and seals to maintain sealing integrity and stability at elevated temperatures that would destroy other materials.

Specialized Silicone Compounds

Sophisticated silicone formulations have been developed to further enhance high heat sealing capabilities:

  • Fiber-reinforced silicones – Increased mechanical strength
  • Ceramic-filled silicones – Reduced hot gas permeability
  • High temperature vulcanizing (HTV) silicones – Optimal properties up to 315°C
  • Low volatile silicones – Prevent seal contamination in vacuum environments

Key Applications

Some of the most challenging high-heat sealing applications that benefit from silicone gaskets and seals include:

  • Automotive and aerospace engines
  • Industrial furnaces and ovens
  • Power generation equipment
  • Ceramic machinery
  • Chemical/petrochemical processing units

Partner with a Trusted Silicone Expert

As a leading silicone manufacturer for over 30 years, we have unmatched expertise in engineering customized silicone solutions optimized for every client’s specific high temperature sealing needs.

Our technical experts can help determine the optimal silicone formulation required to deliver maximum heat resistance, durability and longevity in your most demanding applications. We have experience developing innovative silicone compounds for temperatures up to 300°C.

Contact us today to discuss your project details. We will partner with you to design the ideal silicone gasket or seal for your equipment and process conditions, ensuring reliable high temperature sealing performance.

With More than 30 Years' Experience

DX provides you with all-around silicone product customization services for valued customers like you.