High Temp Products
Seal, shield, and insulate at temperature with graphite foil, rigid insulation, and carbon/graphite felts. Our applications engineers work across metallurgical casting, electronics, chemical, nuclear, defense/aerospace, solar, LED, and semiconductor processes to help you choose confidently.
Engineered Materials for
High-Temperature Performance
Thermal performance depends on selecting the right material for the job. Ei6 supplies graphite foil for reliable sealing and insulating applications, rigid graphite insulation for heat-treating environments, and carbon/graphite felts that conform to complex furnace geometries. Explore the properties in the tables below, then request a quote to match materials to your process.
Heat Treating Insulation Solutions
Graphite Foil (PES)
Sealing and heat-barrier performance in sheet or roll form
Graphite foil delivers dependable sealing performance where temperature, pressure, and media challenge conventional materials. Choose from defined PES grades and thicknesses to balance carbon content, impurity levels, tensile strength, and compressibility for your service. Rolls and sheets support efficient nesting and part yield in production.
- Typical uses include gasket and packing material, thermal barrier layers in high-heat assemblies, high-temperature valve sealing, protective vessel layers, and fuel-cell applications.
- Stockable formats: sheets and rolls in multiple thickness ranges; ask for current width/length options.
- Grades available: PES-15, PES-13, PES-10, PES-5, PES-2, PES-1N.
GRI Rigid Insulation
Graphite shapes for reduced heat loss and temperature uniformity
GRI rigid insulation is engineered for heat-treating environments that demand stable temperatures and long service life. Boards are available as base GRI as well as faced variants to tune durability, gas barrier, and radiative characteristics. Property data include density, mechanical strength, ash, and thermal conductivity across relevant temperatures and atmospheres.
Where it excels:
- Heat-treating: brazing, sintering, annealing, and related processes
- Furnaces requiring improved uniformity and reduced heat loss
- Installations where durability or gas-barrier performance is a priority
Facing options to tune performance:
- GRI (base): slurry-formed board
- GRI-C / GRI-CC: carbon-composite facing (one/both sides) for added wear/impact resistance
- GRI-G / GRI-GG: graphite-foil facing (one/both sides) to reduce radiative losses and enhance gas barrier behavior
Carbon/Graphite Felt (PAN & Rayon)
Conformable insulation for resistance and induction furnaces
Carbon and graphite felts insulate complex geometries and allow consistent, uniform performance across hot zones. Select PAN-based or rayon-based materials in standard thicknesses and widths, with roll lengths that support efficient fabrication. Properties include density, carbon content, ash, specific heat, thermal conductivity at temperature, and typical processing temperature.
- Furnace insulation and heat shields in resistance and induction systems
- Liners and wraps where conformability and low mass are advantageous
- Layered builds with rigid insulation to balance durability and performance
PAN-Based Carbon and Graphite Felt
Rayon-Based Carbon and Graphite Felt
Technical Support
Applications engineering for high-temperature processes
Our applications engineers help you choose and implement the right graphite materials for high-temperature work. We advise on foil selection, rigid insulation with the appropriate facings, and PAN or rayon felts so your hot zone runs predictably. Support includes selection guidance, trial setup and observation, performance review, and the documentation your QA team requires. The goal is stable temperature control, cleaner installs, and fewer surprises during start-up or changeovers.
Ready to move forward? Talk to a team member or Request a Quote.