High-Temperature Mica | McMaster-Carr

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Dielectric Strength

Thermal Conductivity @ Temperature

2.08 BTU⋅in/(hr⋅ft²⋅°F) @ 68° F

1.39 BTU⋅in/(hr⋅ft²⋅°F) @ 212° F

2.08 BTU⋅in/(hr⋅ft²⋅°F) @ 500° F

Not Rated

Spot Color

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Maximum Intermittent Temperature

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Flammability Rating

EN 13501-1 Class A1

UL 94 V-0

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

Minimum Temperature

RoHS

REACH

Tensile Strength

94 Products

Performance

Flame Retardant

Meet UL 94 V-0 and won’t self-ignite

81 products

Nonflammable

Retain strength even when exposed to hot gas flames

3 products

Performance

Lightweight

Insulate like solid mica at a quarter of the weight

3 products

Flexibility

Flexible

Bend and wrap around objects by hand

22 products

Electrically Insulating Mica Sheets

Insulate electrical components in everything from toasters to circuit breakers. These sheets provide greater vibration resistance than ceramic and withstand higher temperatures than plastic. They can operate continuously at temperatures up to 930° F, but if they stay above that temperature for too long, they may turn to carbon and stop insulating. These sheets meet UL 94 V-0 for flame retardance. Also known as muscovite mica.

Semi-Rigid—These sheets bend like a playing card, so they provide some spring power. Cut them with scissors, punches, or die stamps.

Rigid—Machine with high-speed steel or tungsten carbide tools.

	Thk.	Thk. Tolerance	Dielectric Strength, V/mil	Max. Continuous Temp., ° F	Max. Intermittent Temp., ° F	Flexibility		Each
10" × 12"



		1/8"	-0.0125" to 0.0125"	635	930	1,275	Rigid	8779K51	000000


		1/4"	-0.0250" to 0.0250"	635	930	1,275	Rigid	8779K52	00000
		1/2"	-0.0500" to 0.0500"	635	930	1,275	Rigid	8779K53	000000
		3/4"	-0.0750" to 0.0750"	635	930	1,275	Rigid	8779K54	000000
		1"	-0.1000" to 0.1000"	635	930	1,275	Rigid	8779K55	000000


		20" × 24"



				1/8"	-0.0125" to 0.0125"	635	930	1,275	Rigid	8779K31	000000


				1/4"	-0.0250" to 0.0250"	635	930	1,275	Rigid	8779K32	000000
				1/2"	-0.0500" to 0.0500"	635	930	1,275	Rigid	8779K33	000000
				3/4"	-0.0750" to 0.0750"	635	930	1,275	Rigid	8779K34	000000
				1"	-0.1000" to 0.1000"	635	930	1,275	Rigid	8779K35	000000


				23" × 39"



						0.004"	-0.0004" to 0.0004"	635	930	1,275	Semi-Rigid	8779K11	00000


						0.008"	-0.0008" to 0.0008"	635	930	1,275	Semi-Rigid	8779K12	00000
						0.012"	-0.0012" to 0.0012"	635	930	1,275	Semi-Rigid	8779K13	00000
						0.016"	-0.0016" to 0.0016"	635	930	1,275	Semi-Rigid	8779K14	00000
						0.020"	-0.0020" to 0.0020"	635	930	1,275	Semi-Rigid	8779K15	00000
						0.024"	-0.0024" to 0.0024"	635	930	1,275	Semi-Rigid	8779K16	00000
						0.028"	-0.0028" to 0.0028"	635	930	1,275	Rigid	8779K17	00000
						0.032"	-0.0032" to 0.0032"	635	930	1,275	Rigid	8779K18	00000
						0.036"	-0.0036" to 0.0036"	635	930	1,275	Rigid	8779K19	00000
						0.040"	-0.0040" to 0.0040"	635	930	1,275	Rigid	8779K21	00000
						0.060"	-0.0060" to 0.0060"	635	930	1,275	Rigid	8779K22	000000


						1/8"	-0.0125" to 0.0125"	635	930	1,275	Rigid	8779K23	000000
						1/4"	-0.0250" to 0.0250"	635	930	1,275	Rigid	8779K24	000000
						1/2"	-0.0500" to 0.0500"	635	930	1,275	Rigid	8779K25	000000
						3/4"	-0.0750" to 0.0750"	635	930	1,275	Rigid	8779K26	00000000
						1"	-0.1000" to 0.1000"	635	930	1,275	Rigid	8779K27	00000000


						39" × 47"



								0.004"	-0.0004" to 0.0004"	635	930	1,275	Semi-Rigid	8779K81	00000


								0.008"	-0.0008" to 0.0008"	635	930	1,275	Semi-Rigid	8779K82	00000
								0.012"	-0.0012" to 0.0012"	635	930	1,275	Semi-Rigid	8779K83	00000
								0.016"	-0.0016" to 0.0016"	635	930	1,275	Semi-Rigid	8779K84	00000
								0.020"	-0.0020" to 0.0020"	635	930	1,275	Semi-Rigid	8779K85	00000
								0.024"	-0.0024" to 0.0024"	635	930	1,275	Semi-Rigid	8779K86	00000
								0.028"	-0.0028" to 0.0028"	635	930	1,275	Rigid	8779K87	000000
0.032"								-0.0032" to 0.0032"	635	930	1,275	Rigid	8779K88	000000
0.036"	-0.0036" to 0.0036"							635	930	1,275	Rigid	8779K89	000000
0.040"	-0.0040" to 0.0040"							635	930	1,275	Rigid	8779K91	000000
0.060"	-0.0060" to 0.0060"							635	930	1,275	Rigid	8779K92	000000


1/8"	-0.0125" to 0.0125"							635	930	1,275	Rigid	8779K93	000000
1/4"	-0.0250" to 0.0250"							635	930	1,275	Rigid	8779K94	000000
1/2"	-0.0500" to 0.0500"							635	930	1,275	Rigid	8779K95	00000000
3/4"	-0.0750" to 0.0750"							635	930	1,275	Rigid	8779K96	00000000
1"	-0.1000" to 0.1000"							635	930	1,275	Rigid	8779K97	00000000

Flexible Electrically Insulating Mica Sheets

A resin binder gives these sheets enough flexibility to be used as wrap-around electrical or thermal insulation. They operate continuously at temperatures up to 930° F, but if they stay above that temperature for too long, they may turn to carbon and stop insulating. They meet UL 94 V-0 for flame retardance. Cut these sheets with scissors, die stamps, or punches. Also known as muscovite mica.

	Thk. Tolerance	Dielectric Strength, V/mil	Max. Continuous Temp., ° F	Max. Intermittent Temp., ° F		Each
23" × 39"



	0.004"	-0.0004" to 0.0004"	508	930	1,470	85825K41	000000


	0.008"	-0.0008" to 0.0008"	508	930	1,470	85825K42	00000
	0.012"	-0.0012" to 0.0012"	508	930	1,470	85825K43	00000
	0.016"	-0.0016" to 0.0016"	508	930	1,470	85825K44	00000
	0.020"	-0.0020" to 0.0020"	508	930	1,470	85825K45	00000
	0.024"	-0.0024" to 0.0024"	508	930	1,470	85825K46	00000
	0.028"	-0.0028" to 0.0028"	508	930	1,470	85825K31	00000
	0.032"	-0.0032" to 0.0032"	508	930	1,470	85825K32	00000
	0.036"	-0.0036" to 0.0036"	508	930	1,470	85825K33	00000
	0.040"	-0.0040" to 0.0040"	508	930	1,470	85825K34	00000
	0.060"	-0.0060" to 0.0060"	508	930	1,470	85825K35	000000


	39" × 47"



			0.004"	-0.0004" to 0.0004"	508	930	1,470	85825K81	00000


			0.008"	-0.0008" to 0.0008"	508	930	1,470	85825K52	00000
			0.012"	-0.0012" to 0.0012"	508	930	1,470	85825K53	00000
			0.016"	-0.0016" to 0.0016"	508	930	1,470	85825K82	00000
			0.020"	-0.0020" to 0.0020"	508	930	1,470	85825K83	00000
			0.024"	-0.0024" to 0.0024"	508	930	1,470	85825K56	00000
			0.028"	-0.0028" to 0.0028"	508	930	1,470	85825K84	000000
			0.032"	-0.0032" to 0.0032"	508	930	1,470	85825K85	000000
			0.036"	-0.0036" to 0.0036"	508	930	1,470	85825K86	000000
			0.040"	-0.0040" to 0.0040"	508	930	1,470	85825K87	000000
			0.060"	-0.0060" to 0.0060"	508	930	1,470	85825K88	000000

Nonflammable Mica Panels

Designed to withstand the punishing heat of jet engines, these panels retain their strength for hours even when exposed to hot gas flames. Tested to EN 13501-1 Class A1, they meet the strictest non-combustibility requirements. Use them as a lightweight alternative to carbon fiber, plastic, or aluminum to make fire-rated enclosures, electrical housings, and structural panels. They can be machined with standard cutting and milling tools. All ship with a traceable lot number printed on the packaging.

	Thk. Tolerance	Max. Continuous Temp., ° F	Max. Intermittent Temp., ° F	Flexibility		Each
12" × 12"



	1/2"	-0.0080" to 0.0080"	1,470	1,800	Rigid	9275N11	000000


	20" × 24"



			1/2"	-0.0080" to 0.0080"	1,470	1,800	Rigid	9275N12	000000


			39" × 47"



					1/2"	-0.0200" to 0.0200"	1,470	1,800	Rigid	9275N13	000000

Electrically Insulating Mica Tubes

Insulate electrical components in environments exposed to high heat. These tubes are often used to support wire leads in electric vehicle batteries. They provide greater vibration resistance than ceramic and withstand higher temperatures than plastic. They can operate continuously at temperatures up to 930° F, but if they stay above that temperature for too long, they may turn to carbon and stop insulating. Also known as muscovite mica.

Rigid—Saw, score, or cut to length with standard tools.

Wall Thickness—The thicker the wall, the better a tube can withstand high voltages, resist crushing, and hold up to heat cycling. Thinner walls allow for some heat transfer and are easier to cut.

	OD	ID	Dielectric Strength, V/mil	Max. Continuous Temp., ° F	Max. Intermittent Temp., ° F	Flexibility		6" Long	12" Long	24" Long	36" Long
Made Outside the U.S.







				1/16" Thick Wall

				1/4"	1/8"	558	930	1,470	Rigid	5067K23	00000	00000	000000	000000


				3/8"	1/4"	558	930	1,470	Rigid	5067K24	0000	00000	00000	00000
				1/2"	3/8"	558	930	1,470	Rigid	5067K25	0000	00000	00000	00000
				5/8"	1/2"	558	930	1,470	Rigid	5067K26	0000	00000	00000	00000
				3/4"	5/8"	558	930	1,470	Rigid	5067K27	0000	00000	00000	00000
				1"	7/8"	558	930	1,470	Rigid	5067K28	0000	00000	00000	00000




						1/8" Thick Wall

						1/2"	1/4"	558	930	1,470	Rigid	5067K56	0000	00000	00000	00000


						5/8"	3/8"	558	930	1,470	Rigid	5067K57	0000	00000	00000	00000
						3/4"	1/2"	558	930	1,470	Rigid	5067K58	0000	00000	00000	00000
						1"	3/4"	558	930	1,470	Rigid	5067K59	0000	00000	00000	00000




								1/4" Thick Wall

								3/4"	1/4"	558	930	1,470	Rigid	5067K61	00000	00000	00000	00000


								1"	1/2"	558	930	1,470	Rigid	5067K62	00000	00000	00000	00000
								1 1/2"	1"	558	930	1,470	Rigid	5067K63	00000	00000	00000	00000
								2"	1 1/2"	558	930	1,470	Rigid	5067K64	00000	00000	00000	00000


								Made in the U.S.







												1/16" Thick Wall

												3/8"	1/4"	550	930	Not Rated	Rigid	5067K74	00000	00000	00000	00000


												1/2"	3/8"	550	930	Not Rated	Rigid	5067K75	00000	00000	00000	00000
												5/8"	1/2"	550	930	Not Rated	Rigid	5067K76	00000	00000	00000	00000
												3/4"	5/8"	550	930	Not Rated	Rigid	5067K77	00000	00000	00000	00000
												1"	7/8"	550	930	Not Rated	Rigid	5067K78	00000	00000	00000	00000




1/8" Thick Wall

1/2"	1/4"													550	930	Not Rated	Rigid	5067K86	00000	00000	00000	00000


5/8"	3/8"													550	930	Not Rated	Rigid	5067K87	00000	00000	00000	00000
3/4"	1/2"	550												930	Not Rated	Rigid	5067K88	00000	00000	00000	00000
1"	3/4"	550	930											Not Rated	Rigid	5067K89	00000	00000	000000	000000




		1/4" Thick Wall

		3/4"	1/4"											550	930	Not Rated	Rigid	5067K91	00000	00000	00000	00000


		1"	1/2"											550	930	Not Rated	Rigid	5067K92	00000	00000	00000	00000
		1 1/2"	1"											550	930	Not Rated	Rigid	5067K93	00000	00000	00000	000000
		2"	1 1/2"											550	930	Not Rated	Rigid	5067K94	00000	00000	000000	000000