Master Bond EP5G-80

Key Features

  • Good electrical and thermal conductivity
  • Thixotropic paste
  • Not premixed and frozen
  • NASA low outgassing

Master Bond EP5G-80 is a one-component, graphite-filled epoxy paste for bonding, sealing, and coating applications. It is electrically and thermally conductive. The system has outstanding physical strength properties, stellar dimensional stability, and low shrinkage upon curing. It is not premixed and frozen and has a working life of 8-12 hours at room temperature. Curing is simple and straightforward, 4 hours at 80°C.

EP5G-80 bonds well to a wide variety of substrates such as metals, composites, ceramics, and many plastics. It has a remarkably high tensile modulus and compressive strength. The electrical conductivity is quite robust, with a volume resistivity between 5 to 15 ohm-cm. This exceptionally low volume resistivity allows EP5G-80 to be utilized in applications outside of the typical ones for graphite-filled epoxies (e.g. static dissipation, EMI/RFI shielding). Such a low resistance permits the system to be used for direct connection of substrates where this property is required. Graphite is a desirable filler material because of its performance and cost-effectiveness. EP5G-80 will resist water, oils, and fuels. Its color is black. The service temperature range is -50°C to +175°C. A particularly advantageous feature of EP5G-80 is, it is highly screen printable. It can be used in electronic, aerospace, medical device, optical, and specialty OEM type applications where a non-metallic, conductive epoxy is needed. Some recent applications for graphite-filled epoxy involve lithium-ion batteries, fuel cells as well as carbon brushes.

Product Advantages

  • Convenient handling
  • Non-metallic filler
  • Thermal and electrical conductivity
  • Good lubricity
  • Low coefficient of thermal expansion
  • Passes NASA low outgassing specifications

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