, Electrically Conductive
1-24 hours
Pot Life
Thixotropic Paste
Mixed Viscosity (cps)
Volume Resistivity (ohm-cm, °C)
-65 to 170
Operating Temperature Range (°C)

RBC #6400 is a variable ratio two-part, 100% solids, economical nickel filled conductive epoxy resin. It is designed for use where conductive electrical connections are required and conventional soldering techniques are impractical. RBC #6400 bonds well to metal, glass, ceramics, and plastics.


Mixed Viscosity @ 25oC, cps: Thixotropic
Shelf Life, (closed Container @ 25oC): 12 Months


Color: Grey
Specific Gravity @ 25oC: 3.10
Hardness, Shore D: 85
Linear Shrinkage, in./in.: 0.002
Moisture Absorption 10 Days @ 25oC, %: 0.25
Izod Impact Strength, ft. lbs./in. of notch: 0.38
Tensile Strength @ 25oC, psi: 9,600
Compressive Strength @ 25oC, psi: 14,500


Thermal Conductivity, cal/sec/cm2/oC/cm X 10-4: 39.0
Thermal Stability, 1000 Hrs. @ 175oC, % Wt. Loss: 0.50
Coefficient of Thermal Expansion, in./in./oC X 10-6: 18
Heat Distortion Temperature, oC: 125
Operating Temperature Range, oC: -65 to 170


Volume Resistivity @ 25oC, ohm-cm: 1 x 10-2
The above properties are typical of a semi-flexible formulation cured for 2 hours @ 65oC and 2 hours @ 120oC.

Mixing Instructions:

Stir #6400 Resin and #6400 Hardener thoroughly in its shipping container and then weigh the desired amounts of resin and hardener into a clean container. Mix thoroughly for four minutes by hand, or one minute by machine.
Rigid, heat resistant: 100 parts RBC #6400 A, 50 parts Hardener #6400 B
Semi-flexible, impact and shock resistant: 100 parts RBC #6400 A, 100 parts Hardener #6400 B
Flexible, excellent peel strength: 100 parts RBC #6400 A, 200 parts Hardener #6400 B

Recommended Cure Schedule:

Pot life ranges from 2 – 6 hours depending on batch size and hardener ratio. Cure for 1 week at room temperature (25oC) or 6 hours at 65oC. For optimum properties, cure 2 hours at 65oC followed by 2 hours at 120oC.