Increasing Heat Conductivity of Rubber

[lpgman]

I'm casting an electrical heating element in rubber and want to increase the heat conductivity of the hard rubber. Are there proven methods for putting additives in rubber that will increase its conductivity? The k value of hard rubber is .092 Btu/hr-ft-oF. What are those additives and what will be the heat conductivity of the rubber with the additives?

 

[dvd]

There are a number of thermally conductive potting compounds available. You may be better off buying a commercially available product.