High Temperature Resistant Bonding, Sealing and Coating CompoundsMaster Bond features an extensive line of heat resistant adhesives, sealants, coatings and potting/encapsulation compounds that can withstand temperatures as severe as 600°F and higher. These materials were designed to resist short term and long term exposure to elevated temperatures while maintaining their mechanical and electrical properties.

Adhesives chemistries and heat resistance

Epoxies are the most versatile adhesives at functioning across a wide temperature range, resisting temperatures from 250°F to 650°F. But other adhesive chemistries, such as silicones, UV curable systems and sodium silicate based coatings offer high temperature resistance in combination with highly desirable performance properties. The chart below illustrates temperature resistant values that can be achieved for select grades of different chemistry type systems:

System Type Product Curing Temperature Resistance
One part epoxy EP17HT-LO Heat curing 650°F (343°C)
Two part epoxy EP42HT-2 Room temperature curing 450°F (232°C)
Two part epoxy EP45HTAN Heat curing 500°F (260°C)
One part silicone MasterSil 800 Room temperature curing 572°F (300°C)
Two part silicone MasterSil 972TC-LO Room temperature or heat curing 400°F (204°C)
UV curing UV25 UV light (with optional heat post cure) 500°F (260°C)
Sodium silicate MB600SCN Room temperature or heat curing 700°F (371°C)

Selecting high temperature resistant adhesive

Selecting the right adhesive product for extreme temperature application requires analyzing the following factors:

  • Expected operating temperature
  • Duration of exposure to elevated temperature
  • Glass transition temperature (Tg) of an adhesive
  • Coefficients of thermal expansion (CTE) of bonded substrates
  • Other performance properties requirements (low outgassing, chemical resistance, thermal cycling and shock etc.)

Most engineers tend to pick adhesives rated for higher operating temperatures than needed for their specific applications to ensure a wide safety margin. However, this simplification might lead to trade-offs in performance properties and processing. Master Bond technical experts are ready to help in selecting the right material.

Performance properties of high temperature resistant adhesives

As with all products in the Master Bond family, specific grades vary in viscosity, cure speed, chemical resistance and electrical properties, and can be customized to meet specific application needs.

Special heat resistant grades offer:

  • Ultra high compressive strength
  • Enhanced dimensional stability
  • Thermal conductivity
  • Electrical conductivity
  • Flame retardancy
  • Superb machinability
  • Transparency

UV curable single component compositions provide rigid cure and are ideal for high volume productions. B-staged epoxy cookies and films have gained popularity for high temperature usage because of their unique combination of high strength, toughness, flexibility and electrical insulation properties. High performance, one/two components fluorosilicones retain silicone type flexibility, temperature resistance while possessing extraordinary chemical resistance.

Additionally, products are available which meet NASA low outgassing approval, USP Class VI specifications and are halogen free. Our heat resistant systems are presently employed on satellites, downhole oil equipment, automotive components, medical devices, lasers and other industrial applications.

Some of Our Most Popular High Temperature Resistant Systems

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