Super Lube 98003 Heat Sink Compound, 3 oz Tube

Super Lube 98003 is a heat sink compound; Super Lube’s full name for it is Heat Sink Thermally Conductive Compound. It is a white paste blended with thermally conductive fine metal oxide powders. Spread between a heat-producing component and its heat sink or chassis, it fills the microscopic surface gaps that would otherwise trap air, so heat moves away from the part more efficiently. Its rated thermal conductivity is 2.174 W/m·K (PLTL-73 method).

Key features

• Thermal conductivity 2.174 W/m·K; dielectric constant 4.93
• -40°F to 500°F (-40°C to 260°C); will not harden, dry out or melt
• Low bleed; evaporation under 0.1%; consistency 250 to 310 mm/10
• Adheres to metal surfaces; will not react to rubber or plastic
• Anti-seize qualities help prevent galling, seizing and corrosion and ease later disassembly
• Not classified as hazardous under OSHA HazCom, per the SDS; made in USA

Where to use it

Transistors, power diodes and other semiconductors; automotive electrical parts such as alternators, regulators and rectifiers; thermocouple wells; and CPUs or other heat-generating components mounted to a heat sink or chassis.

How to use

1. Power down and disconnect the device.
2. Clean and dry both surfaces and remove all old compound.
3. Apply the compound to the base of the device case; a thin, even layer is enough to fill the gaps and ensure a complete bond between device and heat sink or chassis.
4. Mount and fasten the part as its maker specifies, and re-apply whenever it is removed.

Compatibility and cautions

Heat sink compound is a thermal product, not a moisture sealant; for sealing electrical connectors, use Super Lube 91003 dielectric grease instead. Keep the paste off electrical contacts and connector pins. The SDS notes it may cause mild eye irritation; wash skin after use. Read the SDS before use.

Choosing between the single tube and the 3-pack

One 3 oz tube covers occasional repairs and many small components. Electronics repair benches, auto-electric shops and production lines that use heat sink compound every day can stock the 98003 3-pack. Our heat sink compound guide explains how it compares with CPU thermal paste.