Component Management

Epoxy is thermally conductive & electrically insulative

10th August 2015
Nat Bowers

Developed for a variety of bonding, sealing, potting and encapsulation applications, Master Bond's EP3RR-80 is a one component epoxy that offers user friendly handling with a moderate viscosity, good flow properties and an unlimited working life at ambient temperatures. The epoxy system can be stored at 4.5-10°C and does not require freezing.

Unlike typical one part epoxies, EP3RR-80 will cure in 45-50 minutes at 80°C (175°F), or in 25-30 minutes at 121°C (250°F). It features low exotherm while curing, enabling it to cure in thicker sections up to and beyond a 1.27cm (1/2" deep). This dimensionally stable compound forms high strength bonds to metals, composites, ceramics, glass and many plastics.

EP3RR-80 has superb electrical insulation characteristics and delivers a thermal conductivity of 5-6 BTU·in/(ft²•hr•°F) [0.72-0.87W/(m•K)] at 75°F. Resistance to water, oils, fuels and many other chemicals is outstanding. Service operating temperature range is from -73.3 to 176.7°C (-100 to +350°F).

This compound is widely employed in the electronic, aerospace, speciality OEM and related industries. It is available for use in syringes as well as standard containers ranging from ½ pints to gallons.

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