Thermal Compound Camparison

Weighing in the Contenders:

Thermalcote Thermal Joint Compound 
Supplied By:  Thermalloy
Price:  $5.50

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Composition

 

Material

Thermal joint compound of thermally-loaded silicone-based grease.

Description and Properties

2oz tube

This is a smooth silicone-based thermal compound with a non-grainy consistency.

 

Thermalcote™ is a superior thermal joint compound of thermally-loaded silicone-based grease for use with all heat sinks. It improves the transfer energy across the metal-to-metal interfaces between the transistor or rectifier case and the heat sink.

Thermalcote conducts heat approximately 15 times better than air and more than 4 times better than unloaded silicone grease. It is non-toxic, extremely stable, and neither cakes nor runs from -40°C to 204°C (-40°F to 392°F).

  Thermal Conductivity                              .3911

  (W/ m*K)

  Electrical Conductivity                              Negligible

 

     

Radio Shack Heat Sink Compound

Supplied By:  Radio Shack
Price:  $1.99

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Composition

 

Material

Silicone based zinc oxide heat sink compound.

Description and Properties

6.5g (.23oz) tube

This is a smooth silicone based thermal compound with a non-grainy consistency.  It’s not runny at room temperature but can become a more watery consistency when heat is applied.  This isn’t an issue because it’s not electrically conductive in nature.

  Thermal Conductivity                              .4187

  (W/ m*K)

  Electrical Conductivity                            Negligible

     

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