Thermal Epoxy Adhesives | McMaster-Carr

Formulated to draw heat away from sensitive electronic components, these potting compounds have higher thermal conductivity than standard potting compounds. Use them to encase electronic assemblies for protection from dust, chemicals, moisture, mechanical shock, and vibration. Rigid and wear resistant, epoxies are the strongest of the potting compounds. They have excellent chemical and moisture resistance, withstand a wide range of temperatures, and provide excellent electrical insulation.

Cartridge potting compound requires a gun and mixer nozzle (each sold separately) to dispense.

Pail and Bottle Compounds—Extra Hard

		Dry Time
Container Size, gal.	Consistency	Touch, min.	Overall, hrs.	Dielectric Strength, V/mil	Thermal Conductivity, W/m-K	Max. Temp., °F	For Use On	Color		Each
1	Thick Liquid	25	24	450	1.87	500°	Steel, Ceramic, Glass	Black	0000000	0000000

One-Time-Use Packet Compounds—Extra Hard

		Dry Time
Container Size, oz.	Consistency	Touch, min.	Overall, hrs.	Dielectric Strength, V/mil	Thermal Conductivity, W/m-K	Temp. Range, °F	Heating Requirements to Reach Full Strength	For Use On	Color		Each
1.4	Paste	90	24	410	0.95	-90° to 230°	2 hrs. @ 140° F	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Silver, Titanium, Plastic, Composites, Fiberglass	Blue	00000000	000000

Cartridge Compounds—Extra Hard

		Dry Time
Container Size, oz.	Consistency	Touch, min.	Overall, hrs.	Dielectric Strength, V/mil	Thermal Conductivity, W/m-K	Temp. Range, °F	For Use On	Color		Each
1.7	Thick Liquid	15	8	520	1.01	-40° to 210°	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Silver, Titanium, Plastic, Composites, Fiberglass	Black	0000000	000000

Two-Part Adhesive Dispensing Guns
Dispensing Gun for 1.7-oz. Cartridges	00000000	Each	000000

Mixer Nozzles for Two-Part Adhesive Cartridges
Mixer Nozzle for 1.7-oz. Cartridges	00000000	Each	00000

Jar and Bottle Compounds—Extra Hard

		Dry Time
Container Size, oz.	Consistency	Touch	Overall, hrs.	Mix Ratio	Tensile Strength, psi	Dielectric Strength, V/mil	Thermal Conductivity, W/m-K	Max. Temp., °F	Heating Requirements to Reach Full Strength	For Use On	Color		Each
19	Thick Liquid	25 min.	24	12:1	10,900	450	1.87	500°	__	Steel, Ceramic, Glass	Black	0000000	0000000
20	Gel	4 hrs.	6	4:1	11,000	Not Rated	1.87	600°	4 hrs. @ 250° F then 2 hrs. @ 350° F	Steel, Ceramic, Glass	Black	0000000	000000

Epoxy Potting Compounds

Encase electronic assemblies in a layer of epoxy for protection from dust, chemicals, moisture, mechanical shock, and vibration. The strongest of the potting compounds, epoxies are rigid and wear resistant. They have excellent chemical and moisture resistance, withstand a wide range of temperatures, and provide excellent electrical insulation. All require a mixer nozzle and gun to dispense.

Loctite® 3336™, ES1001™, ES1902™, and ES2500™ come with a mixer nozzle.

			Dry Time
Mfr. Model No.	Container Size, oz.	Consistency	Touch	Overall	Dielectric Strength, V/mil	Thermal Conductivity, W/m-K	Temp. Range, °F	Specifications Met	For Use On	Choose a Color		Each
3M Compounds—Extra Hard
DP270	1.64	Thick Liquid	3 hrs.	48 hrs.	850	0.18	-65° to 210°	UL 94 HB	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Plastic, Rubber, Glass	Black, Clear	00000000	000000
DP270	6.8	Thick Liquid	3 hrs.	48 hrs.	850	0.18	-65° to 210°	UL 94 HB	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Plastic, Rubber, Glass	Black, Clear	00000000	00000
DP270	13.5	Thick Liquid	3 hrs.	48 hrs.	850	0.18	-65° to 210°	UL 94 HB	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Plastic, Rubber, Glass	Black	00000000	000000
DP270	13.5	Thick Liquid	3 hrs.	48 hrs.	850	0.18	-65° to 210°	UL 94 HB	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Plastic, Rubber, Glass	Clear	00000000	000000
Loctite® Compounds—Extra Hard
3336	1.4	Thick Liquid	15 min.	24 hrs.	Not Rated	Not Rated	-65° to 350°	__	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Silver, Titanium, Plastic, Composites, Fiberglass	Amber	0000000	00000
E-60NC	1.7	Thick Liquid	60 min.	24 hrs.	550	Not Rated	-65° to 250°	__	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Silver, Titanium, Plastic, Composites, Fiberglass	Black	0000000	00000
E-60NC	6.8	Thick Liquid	60 min.	24 hrs.	550	Not Rated	-65° to 250°	__	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Silver, Titanium, Plastic, Composites, Fiberglass	Black	0000000	00000
E-60NC	13.5	Thick Liquid	60 min.	24 hrs.	550	Not Rated	-65° to 250°	__	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Silver, Titanium, Plastic, Composites, Fiberglass	Black	0000000	00000
ES1001	1.7	Thick Liquid	60 min.	24 hrs.	1,100	0.29	-10° to 220°	__	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Plastic, Ceramic, Glass	Black	0000000	00000
ES1902	1.7	Thin Liquid	60 min.	24 hrs.	1,350	Not Rated	-40° to 250°	__	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Plastic	Clear	0000000	00000
ES2500	1.7	Thin Liquid	10 min.	16 hrs.	410	0.28	-40° to 220°	UL 94 HB	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Plastic, Ceramic, Glass	Black	0000000	00000

Mixer Nozzle for 6.8-oz. 3M Cartridges	0000000	Each	00000
Dispensing Gun for 6.8-oz. 3M Cartridges	0000000	Each	000000
Mixer Nozzle for 13.5-oz. 3M Cartridges	00000000	Each	0000
Dispensing Gun for 13.5-oz. 3M Cartridges	00000000	Each	000000
Dispensing Gun for 1.64-oz. and 1.69-oz. 3M Cartridges	0000000	Each	000000
Mixer Nozzle for 1.64-oz. and 1.69-oz. 3M Cartridges (Mixing Elements: 16)	0000000	Each	0000
Mixer Nozzle for 1.64-oz. 3M Cartridges	0000000	Each	0000
Mixer Nozzle for 6.8-oz. and 13.5-oz. Loctite Cartridges	0000000	Each	0000
Dispensing Gun for 6.8-oz. Loctite Cartridges	0000000	Each	00000
Dispensing Gun for 1.4-oz. and 1.7-oz. Loctite Cartridges	00000000	Each	00000
Plunger for 1.4-oz. Loctite Cartridges	00000000	Each	0000
Mixer Nozzle for 1.7-oz. Loctite E-60NC Cartridges	00000000	Each	0000
Dispensing Gun for 13.5-oz. Loctite Cartridges	0000000	Each	000000

Heavy Duty Coatings for Electronics

Thinner than potting compounds, these coatings flow easily into small spaces between electrical components. Use them to secure and insulate hardware on printed circuit boards. Rigid and wear resistant, epoxies have excellent chemical and moisture resistance, withstand a wide range of temperatures, and provide excellent electrical insulation. Dispense with a mixer nozzle and a gun (each sold separately).

			Dry Time
Mfr. Model No.	Container Size, oz.	Consistency	Touch, min.	Overall, hrs.	Dielectric Strength, V/mil	Temp. Range, °F	For Use On	Color		Each
Loctite® Coatings—Extra Hard
E-00CL	1.7	Thick Liquid	5	24	400	-65° to 180°	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Titanium, Silver, Plastic, Composites, Fiberglass	Clear	0000000	000000
E-00CL	6.8	Thick Liquid	5	24	400	-65° to 180°	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Titanium, Silver, Plastic, Composites, Fiberglass	Clear	0000000	00000

Mixer Nozzle for 1.7-oz. Cartridges	00000000	Each	00000
Dispensing Gun for 1.7-oz. Cartridges	00000000	Each	00000
Dispensing Gun for 6.8-oz. Cartridges	0000000	Each	00000
Mixer Nozzle for 6.8-oz. Cartridges	0000000	Each	0000
Mixer Nozzle for 6.76-oz. Cartridges	00000000	Each	0000
Snap In	000000000	Each	0000
Twist Lock	0000000	Each	0000
Twist Lock	000000000	Each	0000
10:1 Mix Ratio Plunger	0000000	Each	000000
10:1 Mix Ratio Plunger	0000000	Each	00000

Conductive Adhesives for Electronics

An alternative to solder, these flexible, silver-filled adhesives accommodate joint movement. Use them to bond electrical components and repair circuits.

Epoxy adhesives are two-part adhesives that need to be mixed together. The size listed is the combined total of the two parts.

Epoxy Adhesives

One-Time-Use Packet

Can

One-Time-Use Packet
Container Size, oz.	Begins to Harden	Reaches Full Strength	Thermal Conductivity, W/m-K	Surface Resistivity, ohms-cm	Mix Ratio	Consistency	Temp. Range, °F	For Joining		Each
0.09	3 hrs.	24 hrs.	1.55	0.05	1:1.15	Paste	-75° to 230°	Ceramic, Glass, Metal	0000000	000000
0.35	3 hrs.	24 hrs.	1.55	0.05	1:1.15	Paste	-75° to 230°	Ceramic, Glass, Metal	0000000	000000
Can
0.5	4 hrs.	5 days	7.93	0.0004	1:1	Paste	80° to 265°	Metal	0000000	000000
1	4 hrs.	5 days	7.93	0.0004	1:1	Paste	80° to 265°	Metal	0000000	000000

Mixer Nozzles for Two-Part Adhesive Cartridges

Bayonet Connection

Taper Tip

Step Tip

Bell-Mount Connection

Twist-Lock Connection

To simultaneously mix and dispense two-part adhesives, attach these mixer nozzles to a dual cartridge. Mixing elements help combine the two parts of an adhesive as it flows through the nozzle. A short nozzle with many mixing elements combines adhesive while minimizing the adhesive left in the nozzle after dispensing. Choose a nozzle that matches the connection type, size, and mix ratio of your adhesive cartridge.

A taper tip has a small opening for controlled dispensing.

A step tip allows you to trim the opening to the diameter you need.

Bayonet Connection

							Each
For Cartridge Size, oz.	Mix Ratio	Opening ID	Lg.	Mixing Elements	Mfr.	Material		Each
Taper Tip
1.45	2:3	0.06"	5.8"	20	3M	Polypropylene Plastic	00000000	00000
1.45	2:3	0.07"	3.3"	16	3M	Polypropylene Plastic	00000000	0000

Bell-Mount Connection

							Each
For Cartridge Size, oz.	Mix Ratio	Opening ID	Lg.	Mixing Elements	Mfr.	Material		Each
5-Step Tip
6.76, 13.5	1:1, 2:1	0.07"-0.21"	7.3"	20	3M	Polypropylene Plastic	0000000	00000
6.76, 13.52	1:1, 2:1	0.66"	5"	20	3M	Polypropylene Plastic	00000000	0000

Twist-Lock Connection

							Each
For Cartridge Size, oz.	Mix Ratio	Opening ID	Lg.	Mixing Elements	Mfr.	Material		Each
Taper Tip
1.52	10:1	0.08"	3.6"	16	3M	Polypropylene Plastic	0000000	00000

Conductive Surface Fillers for Electronics

A high silver content allows these surface fillers to conduct electricity and heat. Use them to fill gaps and rebuild missing material on electrical connections or to assemble new components. Product regulations restrict sales to the listed jurisdictions/areas.

Surface fillers in one-time-use packets and jars come as two parts. The size listed is the combined total of the two parts.

Surface filler in a pen dispenses as a thin, ready-to-use liquid that fills in pitting and small gaps. It’s often used on circuit boards to fix components or to prototype new systems.

Volume resistivity and surface resistivity measure 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.

	Container								Temp. Range, °F
Mfr. Model No.	Size, oz.	Type	Begins to Harden	Reaches Full Strength	Thermal Conductivity, W/m-K	Volume Resistivity, ohms-cm	Surface Resistivity, ohms/sq.	Mix Ratio	Min.	Max.	For Use On	Cannot Be Sold To		Each
Loctite® Surface Fillers
3888	0.1	One-Time-Use Packet	90 min.	24 hrs.	1.44	0.001	__	100:6	-40°	170°	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Titanium, Polycarbonate Plastic	__	0000000	000000
Surface Fillers
__	0.1	One-Time-Use Packet	90 min.	24 hrs.	6.05	0.009	__	100:6	-75°	250°	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Titanium, Ceramic, Glass	__	0000000	00000
__	0.2	Pen	3 min.	60 min.	Not Rated	__	0.050	__	-65°	300°	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Titanium	Outside United States and Canada	0000000	00000
__	0.4	One-Time-Use Packet	90 min.	24 hrs.	6.05	0.009	__	100:6	-75°	250°	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Titanium, Ceramic, Glass	__	0000000	000000
__	0.5	Jar	4 hrs.	5 days	5.77	0.0004	__	1:1	Not Rated	300°	Aluminum, Brass, Copper, Steel, Stainless Steel	__	0000000	000000
__	1	Jar	4 hrs.	5 days	5.77	0.0004	__	1:1	Not Rated	300°	Aluminum, Brass, Copper, Steel, Stainless Steel	__	0000000	000000