Heat Sink Compounds | McMaster-Carr

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Material Material

Zinc Oxide

Rubber

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	Compatible With Compatible With

	For Use On For Use On

3D Printer Extruder Heating
Elements

Close-Fitting Parts

Electrical Components

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Color Color

	White
	Copper
	Silver

	Minimum Temperature Minimum Temperature

	Additive Additive

	Melting Temperature Melting Temperature

	Specifications Met Specifications Met

Mil. Spec.

ASTM

	For Surface Material For Surface Material

	Electrical Resistivity Electrical Resistivity

	Lubricant Type Lubricant Type

Antiseize Lubricant

Grease

Machining and Fabricating
Lubricant

	Trade Name Trade Name

LB 8008 C5-A Copper-Based
Anti-Seize

LB 8065 C5-A Copper-Based
Anti-Seize

	For Use Outdoors For Use Outdoors

Yes

	Dielectric Strength Dielectric Strength

13.4V/mil

Not Rated

	Begins to Harden Begins to Harden

1 hrs.

6 hrs.

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68 Products

About Lubricants

About Grease

Bond heat sinks to surfaces, eliminating air gaps for maximum heat transfer. These compounds are commonly used with transistors, diodes, rectifiers, and transformers. Product regulations restrict sales to the listed jurisdictions/areas.

Zinc-oxide compounds create a more secure bond than silicone compounds.

		Container
Thermal Conductivity	Temp. Range, °F	Type	Size	Manufacturer	Manufacturer Model Number	Specifications Met	Cannot Be Sold To		Each
Silicone
0.68 W/m-K @ 97° F	-40° to 390°	Tube	5 oz.	Dow Corning	340	__	__	00000000	000000
0.75 W/m-K @ 97° F	-40° to 400°	Tube	8 oz.	__	__	__	__	00000000	00000
0.75 W/m-K @ 97° F	-40° to 400°	Pail	80 lbs.	__	__	__	__	000000000	00000000
Zinc Oxide
0.92 W/m-K @ 97° F	-40° to 320°	Tube	2 oz.	__	__	MIL-C-47113	__	0000000	00000
0.92 W/m-K @ 97° F	-40° to 320°	Syringe	1 oz.	__	__	MIL-C-47113	__	00000000	00000
0.92 W/m-K @ 97° F	-40° to 390°	Tube	4 oz.	__	__	ASTM D5470	Outside United States and Canada	00000000	00000
0.92 W/m-K @ 97° F	-40° to 390°	Jar	16 oz.	__	__	ASTM D5470	Outside United States and Canada	00000000	00000
5 W/m-K @ 97° F	-40° to 500°	Tube	2 oz.	__	__	__	__	00000000	00000
5 W/m-K @ 97° F	-40° to 500°	Tube	4 oz.	__	__	__	__	00000000	00000
5 W/m-K @ 97° F	-40° to 500°	Jar	16 oz.	__	__	__	__	00000000	000000
5 W/m-K @ 97° F	-40° to 500°	Syringe	1 oz.	__	__	__	__	00000000	00000

Non-Bonding Heat Transfer Compounds

Heat Transfer Compound

Also known as thermal paste, these boron-nitride compounds increase heat transfer between parts while preventing them from sticking. Unlike antiseize compounds, they don't conduct electricity, so you won't risk shorting out sensitive electronics. They're often used on thermocouple probes to improve accuracy. You can also use them in 3D printer heating blocks and other high-temperature areas to keep parts from fusing together.

Container
Size, oz.	Type	Chemical	Max. Temp., °F	Thermal Conductivity	Color	Includes	For Use On	Compatible With		Each
0.2	Syringe	Boron Nitride	1562°	31.4 W/m-K @ 212° F	White	Three Applicator Brushes	3D Printer Extruder Heating Elements, Electrical Components	Aluminum, Brass, Copper, Iron, Nickel, Stainless Steel, Steel, Titanium	0000000	000000
1	Syringe	Boron Nitride	1562°	31.4 W/m-K @ 212° F	White	__	3D Printer Extruder Heating Elements, Electrical Components	Aluminum, Brass, Copper, Iron, Nickel, Stainless Steel, Steel, Titanium	0000000	00000

Heat-Transfer Putty

To eliminate air gaps that can cause heat loss and premature heater failure, mold this putty around heat cable to make direct contact with the pipe.

Container
Size	Type	Begins to Harden, hrs.	Reaches Full Strength, hrs.	For Surface Material	For Use Outdoors		Each
450° F Max. Temp.
10 oz.	Cartridge	__	__	Ceramic, Glass, Metal, Plastic	Yes	0000000	000000
32 oz.	Cartridge	__	__	Ceramic, Glass, Metal, Plastic	Yes	0000000	00000
1 qt.	Can	__	__	Ceramic, Glass, Metal, Plastic	Yes	0000000	00000
1 gal.	Can	__	__	Ceramic, Glass, Metal, Plastic	Yes	0000000	00000
5 gal.	Can	__	__	Ceramic, Glass, Metal, Plastic	Yes	0000000	000000
750° F Max. Temp.
10 oz.	Cartridge	1	24	Ceramic, Glass, Metal, Plastic	No	0000000	00000
32 oz.	Cartridge	1	24	Ceramic, Glass, Metal, Plastic	No	0000000	00000
1 qt.	Can	1	24	Ceramic, Glass, Metal, Plastic	No	0000000	00000
1 gal.	Can	6	24	Ceramic, Glass, Metal	No	000000	00000
5 gal.	Can	6	24	Ceramic, Glass, Metal	No	000000	000000
1,250° F Max. Temp.
10 oz.	Cartridge	1	24	Ceramic, Glass, Metal, Plastic	No	0000000	00000
32 oz.	Cartridge	1	24	Ceramic, Glass, Metal, Plastic	No	0000000	00000
1 qt.	Can	1	24	Ceramic, Glass, Metal, Plastic	No	0000000	00000
1 gal.	Can	1	24	Ceramic, Glass, Metal, Plastic	No	0000000	00000
5 gal.	Can	1	24	Ceramic, Glass, Metal, Plastic	No	0000000	000000

Electrically Conductive Antiseize Lubricants

Copper allows these lubricants to conduct electricity, while graphite gives them good chemical and corrosion resistance. Also known as thread lubricants, antiseize lubricants prevent threaded fasteners and close-fitting parts from locking together due to corrosion, contamination, or heat.

Loctite® C5-A Copper-Based Anti-Seize lubricants can be used with salt water and petroleum-based chemicals. LB 8065 comes as a stick for no-mess application.

Lubricants that meet MIL-A-907 and MIL-PRF-907 have been tested to prevent corrosion of copper and for antiseize properties when used with steel nuts and studs.

Dielectric strength measures the maximum voltage a lubricant can withstand without losing its insulating properties. The higher the dielectric strength, the better its quality as an insulator.

Electrical resistivity is a measure of how well a material opposes the flow of electricity. The lower the rating, the more electricity it conducts.

Each

Container
Size	Type	Additive	Electrical Resistivity	Dielectric Strength, V/mil	Temp. Range, °F	Color	Specifications Met	Compatible With		Each
Loctite® LB 8008 C5-A Copper-Based Anti-Seize
0.1 oz.	One-Time-Use Pack	Copper, Graphite	Not Rated	Not Rated	-20° to 1800°	Copper	__	Aluminum, Brass, Copper, Iron, Plastic, Stainless Steel, Steel	000000	00000
0.2 oz.	One-Time-Use Pack	Copper, Graphite	Not Rated	Not Rated	-20° to 1800°	Copper	__	Aluminum, Brass, Copper, Iron, Plastic, Stainless Steel, Steel	0000000	0000
1 oz.	Tube	Copper, Graphite	Not Rated	Not Rated	-20° to 1800°	Copper	__	Aluminum, Brass, Copper, Iron, Plastic, Stainless Steel, Steel	0000000	0000
4 oz.	Brush-Top Can	Copper, Graphite	Not Rated	Not Rated	-20° to 1800°	Copper	__	Aluminum, Brass, Copper, Iron, Plastic, Stainless Steel, Steel	0000000	00000
4 oz.	Tube	Copper, Graphite	Not Rated	Not Rated	-20° to 1800°	Copper	__	Aluminum, Brass, Copper, Iron, Plastic, Stainless Steel, Steel	0000000	00000
8 oz.	Brush-Top Can	Copper, Graphite	Not Rated	Not Rated	-20° to 1800°	Copper	__	Aluminum, Brass, Copper, Iron, Plastic, Stainless Steel, Steel	0000000	00000
10 oz.	Brush-Top Can	Copper, Graphite	Not Rated	Not Rated	-20° to 1800°	Copper	__	Aluminum, Brass, Copper, Iron, Plastic, Stainless Steel, Steel	0000000	00000
1 lbs.	Brush-Top Can	Copper, Graphite	Not Rated	Not Rated	-20° to 1800°	Copper	__	Aluminum, Brass, Copper, Iron, Plastic, Stainless Steel, Steel	0000000	00000
1 lbs.	Can	Copper, Graphite	Not Rated	Not Rated	-20° to 1800°	Copper	__	Aluminum, Brass, Copper, Iron, Plastic, Stainless Steel, Steel	0000000	00000
2.5 lbs.	Can	Copper, Graphite	Not Rated	Not Rated	-20° to 1800°	Copper	__	Aluminum, Brass, Copper, Iron, Plastic, Stainless Steel, Steel	000000	00000
8 lbs.	Can	Copper, Graphite	Not Rated	Not Rated	-20° to 1800°	Copper	__	Aluminum, Brass, Copper, Iron, Plastic, Stainless Steel, Steel	0000000	000000
42 lbs.	Pail	Copper, Graphite	Not Rated	Not Rated	-20° to 1800°	Copper	__	Aluminum, Brass, Copper, Iron, Plastic, Stainless Steel, Steel	0000000	000000
Loctite® LB 8065 C5-A Copper-Based Anti-Seize
0.7 oz.	Stick	Copper, Graphite	Not Rated	Not Rated	Not Rated to 1800°	Copper	__	Aluminum, Brass, Copper, Iron, Plastic, Stainless Steel, Steel	0000000	0000
Lubricants
4 oz.	Brush-Top Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Copper	MIL-A-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	0000000	00000
8 oz.	Brush-Top Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Silver	MIL-PRF-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	00000000	00000
8 oz.	Brush-Top Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Copper	MIL-A-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	0000000	00000
12 oz.	Aerosol Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Copper	MIL-A-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	0000000	00000
16 oz.	Grease Gun Cartridge	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Copper	MIL-A-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	0000000	00000
1 lbs.	Brush-Top Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Silver	MIL-PRF-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	00000000	00000
1 lbs.	Brush-Top Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Copper	MIL-A-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	0000000	00000
2 lbs.	Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Copper	MIL-A-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	0000000	00000
1 gal.	Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Copper	MIL-A-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	0000000	000000

Package

Container
Size	Type	Additive	Electrical Resistivity	Dielectric Strength, V/mil	Temp. Range, °F	Color	Specifications Met	Compatible With	Pkg. Qty.		Pkg.
Lubricants
4 oz.	Brush-Top Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Copper	MIL-A-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	24	00000000	0000000
8 oz.	Brush-Top Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Silver	MIL-PRF-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	12	000000000	000000
8 oz.	Brush-Top Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Copper	MIL-A-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	12	00000000	000000
12 oz.	Aerosol Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Copper	MIL-A-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	12	00000000	000000
16 oz.	Grease Gun Cartridge	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Copper	MIL-A-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	12	00000000	000000
1 lbs.	Brush-Top Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Silver	MIL-PRF-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	12	000000000	000000
1 lbs.	Brush-Top Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Copper	MIL-A-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	12	00000000	000000
2 lbs.	Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Copper	MIL-A-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	6	00000000	000000
1 gal.	Can	Copper, Graphite	3.5×10⁹ ohms-cm	13.4	-65° to 2000°	Copper	MIL-A-907	Aluminum, Brass, Carbide, Copper, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium	4	00000000	000000

Electrically and Thermally Conductive Grease

A high silver content gives this grease excellent conductivity for applications where electricity and heat transfer are required. It is suitable for ESD (electrostatic discharge) and EMI (electromagnetic interference) shielding applications. Product regulations restrict sales to the listed jurisdictions/areas.

NLGI viscosity grade is a rating of a grease's consistency. NLGI 2 is about the consistency of peanut butter.

Electrical resistivity is a measure of how well a material opposes the flow of electricity. The lower the rating, the more electricity it conducts.

Thermal conductivity measures a material’s ability to transfer heat. The higher the rating, the more heat it transfers.

Grease lubricates most efficiently within the listed temperature range. Melting temperature is the point at which grease will fail and run out of equipment, leaving it to run dry.

			Container
NLGI Viscosity Grade	Base Oil	Additive	Size, oz.	Type	Temp. Range, °F	Melting Temp., °F	Electrical Resistivity, ohms-cm	Thermal Conductivity	Color	Cannot Be Sold To		Each
Silicone Thickener
Not Rated	Synthetic	100% Silver	0.2	Syringe	-70° to 485°	490°	0.010	40 Btu/hr. × in./sq. ft./°F	Silver	Outside United States and Canada	0000000	000000
Grease without Thickener
2	Synthetic	75% Silver	1	Jar	-70° to 500°	Not Rated	0.005	60 Btu/hr. × in./sq. ft./°F	Silver	__	0000000	000000
2	Synthetic	85% Silver	0.5	Jar	-40° to 300°	Not Rated	0.005	60 Btu/hr. × in./sq. ft./°F	Silver	__	0000000	000000
2	Synthetic	85% Silver	1	Jar	-40° to 300°	Not Rated	0.005	60 Btu/hr. × in./sq. ft./°F	Silver	__	0000000	000000

Electrical Discharge Machining Lubricants

These electrical discharge machining (EDM) lubricants resist oxidation, so they last longer and extend the life of your electrode. They're clear for workpiece visibility. They are chlorine free, for use where chlorine waste disposal is a concern, and sulfur free. Use at full strength.

Each

Container
Size, gal.	Type	Compatible With		Each
1	Jug	Aluminum, Brass, Carbide, Cast Iron, Copper, Stainless Steel, Steel, Titanium	000000	000000
5	Pail	Aluminum, Brass, Carbide, Cast Iron, Copper, Stainless Steel, Steel, Titanium	000000	000000

Package

Container
Size, gal.	Type	Compatible With	Pkg. Qty.		Pkg.
1	Jug	Aluminum, Brass, Carbide, Cast Iron, Copper, Stainless Steel, Steel, Titanium	4	00000000	000000

Conductive Liquid Gallium

A safe alternative to mercury in thermometers and thermostats, gallium transfers heat and electricity without toxic vapor that can be inhaled. Also known as Galinstan. Its low melting point means it's liquid at room temperature. When used next to parts that generate concentrated heat, it dissipates the heat quickly, making it good thermal interface material. It also allows electricity to pass throughout it, so it's often used in switches and electronics that must bend and flex.

Gallium clings to both metallic and nonmetallic surfaces such as glass and quartz. However, it eats away at most metal when used at high temperatures and dissolves aluminum even at ambient temperatures.

When choosing gallium, keep in mind its composition. The higher the gallium and indium content, the better it is at transferring heat. Gallium with tin reduces the melting point, but also decreases how well it transfers heat.

Material Composition			Container
Gallium	Indium	Tin	Size, fl. oz.	Type	Melting Temperature, °F	Maximum Temperature, °F	For Use On		Each
66.5%	20.5%	13%	0.1	Syringe	50°	930°	Glass, Nickel Alloys, Quartz, Stainless Steel, Steel	0000000	0000000
75.5%	24.5%	__	0.1	Syringe	60°	930°	Glass, Nickel Alloys, Quartz, Stainless Steel, Steel	0000000	000000