Insulation

Insulation Solutions for High-Performance Applications

Insulation is essential in environments where heat, electricity, or environmental exposure can compromise performance or safety. Whether you need to control thermal transfer, prevent electrical conduction, or create a durable environmental barrier, thermoset composite laminates deliver reliable, predictable insulating performance.

Atlas Fibre supplies and fabricates a wide range of thermoset insulation materials engineered for demanding industries including aerospace, aviation, defense, energy storage, transportation, and semiconductor equipment. With the largest in-stock inventory of thermoset materials in North America and a fully integrated machining operation, we support everything from prototype runs to continuous repeat production

Why Thermoset Composites Excel as Insulators

Thermoset materials are uniquely suited for insulation because they maintain strength, stability, and insulating properties even under extreme conditions. Unlike thermoplastics, they cannot be remelted, giving them superior thermal stability and long-term reliability.

These properties make thermosets a go-to choice for engineers designing components that must withstand heat, voltage, mechanical stress, and environmental exposure.

Thermoset insulating materials offer:

  • High dielectric strength for electrical isolation
  • Low thermal conductivity for thermal protection
  • Dimensional stability across temperature fluctuations
  • Resistance to moisture, chemicals, and corrosion
  • Lightweight construction compared to metals
  • Predictable performance in harsh or mission-critical environments

Types of Insulation

Electrical insulation prevents current from flowing through or between components. Thermoset laminates offer excellent dielectric properties and are widely used in:

  • Power distribution equipment
  • Motor and generator components
  • Aerospace electrical systems
  • EV battery and powertrain assemblies
  • Circuit boards, brackets, and isolating hardware

Materials commonly used: Epoxy laminates (G10/FR4), glass-reinforced composites, phenolic laminates, melamine laminates.

Thermal insulation reduces heat transfer and protects components from elevated temperatures. Applications include:

  • Heat shields and thermal barriers
  • EV battery pack insulation
  • High-temperature aerospace structures
  • Industrial equipment housings

Materials commonly used: Phenolic laminates, silicone-based composites, high-temp glass-reinforced laminates.

Environmental & Chemical Insulation: Many thermoset materials also provide protective barriers against moisture, corrosion, solvents, fuels, and chemicals – critical for aerospace, semiconductor, and industrial applications.

Thermoset Insulation Materials

Phenolic Laminates

High-strength thermoset composites with inherently low thermal conductivity and excellent electrical insulating properties.

Epoxy Laminates (G10 / FR4)

Glass-reinforced epoxy composites known for high dielectric strength and exceptional dimensional stability.

Melamine Laminates

Thermoset composites engineered for superior arc and track resistance under electrical stress.

Glass-Mat Thermosets (GMT)

Compression-molded glass-mat reinforced composites used for structural and insulating applications.

Silicone-Based Composites

High-temperature thermoset composites that remain flexible while providing reliable insulation.

Material and Parts for Electrical Insulators

Thermoset Insulation: How It’s Used

Thermoset insulation is used across advanced manufacturing and engineering environments. Common applications include:

  • Cable connectors and electrical terminations
  • Bus bars, phase barriers, and switchgear components
  • EV battery insulation and cell barriers
  • Heat shields and thermal management components
  • Aerospace electrical and mechanical insulation
  • Semiconductor tooling and fixturing
  • Structural components requiring both strength and insulation

Whether you need a machined component, a fabricated assembly, or raw materials, Atlas Fibre provides solutions that perform reliably under pressure.

Machining & Fabrication Capabilities

Atlas Fibre’s vertically integrated manufacturing and machining operation includes 85+ CNC mills, routers, Swiss CNC, lathes, and advanced automation for precision machining of thermoset and high-performance thermoplastic materials.

  • High-tolerance machining of complex insulating parts
  • Support for custom components and Batch Size One projects
  • Full material selection support from experienced engineers
  • Cleanroom-compatible machining for sensitive applications (if needed)

We maintain over $8 million in raw materials in Illinois and an additional $4 million across partner facilities—ensuring unmatched availability, speed, and consistency.

Work With the Leading Supplier of Thermoset Insulating Materials

For more than 60 years, Atlas Fibre has supplied OEMs, fabricators, and engineering teams with composite materials and precision-machined insulating components. Our inventory depth, machining expertise, and reliability make us the preferred source for companies that cannot afford downtime or performance failure.

Contact Atlas Fibre

Need electrical, thermal, or environmental insulation materials—or a machined component that requires high-performance insulating properties? Our team can help you identify the right material and provide a fast, accurate quote.

Contact Us

CalL us now(847) 674-1234