Datasheet

Page 2
Directions for Use
Thermal pastes can be applied to the base and mounting studs of diodes, transistors, thyristors, heat sinks,
silicone rectifiers and semi-conductors, thermostats, power resistors and radiators, to name but a few. When the
contact surfaces are placed together, a firm metal-to-metal contact will only be achieved on 40 – 60% of the
interface, depending on the smoothness of the surfaces. This means that air, which has relatively poor thermal
conductivity, will account for the balance of the interface. Only a small amount of compound is required to fill
these spaces and thus dramatically increase the effective surface area for heat transfer.
It is important to note that the quality of application of a thermal paste can be as important as the thermal
conductivity of the material applied; best results are achieved when a uniform, thin coat is applied between the
mating surfaces. Spray a thin, even layer of the compound onto one of the contact surfaces. Ensure that the
entire interface is covered to avoid hot-spots from forming. Any excess paste squeezed out during the mounting
process should be removed. Product contains flammable solvent therefore do not spray onto live electrical
equipment or other sources of ignition. Please refer to the MSDS for further information.
Additional Information
There are many methods of measuring thermal conductivity, resulting in large variances in results. Electrolube
utilise a heat flow method which takes into account the surface resistance of the test substrate, thus offering
highly accurate results of true thermal conductivity. Some alternative methods do not account for such surface
resistance and can create the illusion of higher thermal conductivity. Therefore, when comparing thermal
conductivity measurements it is important to know what test method has been utilised. For more information
please contact the Electrolube Technical Department.
The rate at which heat flows is dependent on the temperature differential, the thickness and uniformity of the
layer, and the thermal conductivity of the material. Products with the same comparable thermal conductivity
value may have very different efficiencies of heat transfer in the end application depending on how successfully
a thin even film can be applied.
A full range of heat transfer products are available from Electrolube: high thermal conductivity pastes (HTCP),
silicone based pastes for very high temperature applications (HTS), gap filling materials (HTCPX), Silicone
RTVs (TCOR, TCER), epoxy adhesives (TBS) and encapsulation resins (ER2220, UR5633, SC2003).
Revision 2: April 2016