FSK Insulation | McMaster-Carr

Filter by

Thickness

Maximum Temperature

Flexibility

Width

Material

Insulation R Value

Length

For Use On

Enclosures and Equipment

Ovens and Furnaces

Pipe

Tanks

Maximum Facing Temperature

Color

Performance

Highly Thermally Insulating

Minimum Temperature

-60° F

-40° F

0° F

Heat Flow Rate @ Temperature

Density

Flammability Rating

ASTM E84 0/0 for Flame and Smoke

ASTM E84 25/50 for Flame and Smoke

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

Yes

RoHS

Compliant

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

REACH

32 Products

About Selecting Thermal Insulation

Compare R-value and temperature range to find the insulation material that best suits your application.

Rigid Fiberglass Insulation Sheets for Ducts

Foil Facing

Insulate rectangular ductwork.

Foil Facing—Sheets with foil facing reflect heat. The foil facing is also known as foil scrim kraft (FSK). Seal with reinforced HVAC tape (sold separately).

										Facing		Foil Facing
	Thk.	Wd.	Lg., ft.	Insulation R Value	Flexibility	Temp. Range, ° F	Heat Flow Rate @ Temp.	Color	Flammability Rating	Temperature, ° F	Color		Each
3 lb/ft³ Density



		1"	24"	4	4.3	Rigid	0 to 450	0.23 BTU/hr @ 75° F	Yellow	ASTM E84 25/50 for Flame and Smoke	0 to 150	Silver	9350K1	000000


		1 1/2"	24"	4	6.5	Rigid	0 to 450	0.23 BTU/hr @ 75° F	Yellow	ASTM E84 25/50 for Flame and Smoke	0 to 150	Silver	9350K2	00000
		2"	24"	4	8.7	Rigid	0 to 450	0.23 BTU/hr @ 75° F	Yellow	ASTM E84 25/50 for Flame and Smoke	0 to 150	Silver	9350K3	00000


		6 lb/ft³ Density



				1"	24"	4	4.3	Rigid	0 to 450	0.23 BTU/hr @ 75° F	Yellow	ASTM E84 25/50 for Flame and Smoke	0 to 150	Silver	9351K1	00000


				1 1/2"	24"	4	6.5	Rigid	0 to 450	0.23 BTU/hr @ 75° F	Yellow	ASTM E84 25/50 for Flame and Smoke	0 to 150	Silver	9351K2	00000
				2"	24"	4	8.7	Rigid	0 to 450	0.23 BTU/hr @ 75° F	Yellow	ASTM E84 25/50 for Flame and Smoke	0 to 150	Silver	9351K3	00000

Tape

		Each
Reinforced HVAC Tape With Paper Liner and Foil Facing	76145A19	000000
Reinforced Insulation Tape	76755A67	00000

Rigid Mineral Wool Insulation Sheets


Sheet	Sheets with Foil Facing

These durable sheets resist compression and are often used in oven and power-generating applications. To use outdoors, add metal jacketing.

Sheets with Foil Facing—Sheets with foil facing reflect heat. The foil facing is also known as foil scrim kraft (FSK).

Flame Resistant—Flame-resistant sheets meet ASTM E84 0/0 for flame and smoke.

	Wd.	Lg., ft.	Insulation R Value	Heat Flow Rate @ Temp.	Color	Flexibility	Performance	Flammability Rating	Max. Temp., ° F	Density, lb/ft³		Each
Sheets with Foil Facing



	1"	24"	4	4.3	0.24 BTU/hr @ 75° F	Green	Semi-Rigid	Flame Resistant	ASTM E84 0/0 for Flame and Smoke	1,200	8	9328K511	000000


	1 1/2"	24"	4	6.5	0.24 BTU/hr @ 75° F	Green	Semi-Rigid	Flame Resistant	ASTM E84 0/0 for Flame and Smoke	1,200	8	9328K512	00000
	2"	24"	4	8.7	0.24 BTU/hr @ 75° F	Green	Semi-Rigid	Flame Resistant	ASTM E84 0/0 for Flame and Smoke	1,200	8	9328K513	00000
	3"	24"	4	12.5	0.24 BTU/hr @ 75° F	Green	Semi-Rigid	Flame Resistant	ASTM E84 0/0 for Flame and Smoke	1,200	8	9328K514	00000
	4"	24"	4	16.5	0.24 BTU/hr @ 75° F	Green	Semi-Rigid	Flame Resistant	ASTM E84 0/0 for Flame and Smoke	1,200	8	9328K515	00000

Fiberglass Pipe Insulation Sheets

Foil Jacket

Cut custom shapes to fit pipe that runs hundreds of degrees hotter than rubber and polyethylene foam insulation can handle. They're often used near hot water supply and steam lines.

Foil Jacket—Form a barrier that repels moisture and protects against dirt, dust, and minor scuffs. The surface also reflects heat to reduce heat gain on cold lines and heat loss on hot ones.

Insulation Tapes—Wrap around pipe insulation to seal shut.

	Pipe Insulation										Insulation Tapes
									Plain Backing
	Thk.	Wd.	Lg., ft.	Temp. Range, ° F	Insulation R Value	Heat Flow Rate @ Temp.	Density, lb/ft³	Flexibility		Each		Each
Foil Jacket



		1"	36"	20	-60 to 450	3.7	0.27 BTU/hr @ 75° F	3	Flexible	9333K71	0000000	76145A19	000000


		1 1/2"	36"	20	-60 to 450	5.6	0.27 BTU/hr @ 75° F	3	Flexible	9333K73	000000	76145A19	00000
		2"	36"	20	-60 to 450	7.4	0.27 BTU/hr @ 75° F	3	Flexible	9333K75	000000	76145A19	00000

Flexible Fiberglass Insulation Sheets for Ducts

Wrap rectangular and round ductwork with this flexible insulation.

Foil Facing

Sheets with foil facing reflect heat. The foil facing is also known as foil scrim kraft (FSK).

									10 ft. × 48"		50 ft. × 48"		75 ft. × 48"		100 ft. × 48"
Thk.	Insulation R Value	Flexibility	Temp. Range, ° F	Heat Flow Rate @ Temp.	Density, lb/ft³	Color	Facing Color	Flammability Rating		Each		Each		Each		Each
1 1/2"	4.5	Flexible	0 to 250	0.25 BTU/hr @ 75° F	1	Brown	Silver	ASTM E84 25/50 for Flame and Smoke	9160K17	000000	———	0	———	0	9160K18	0000000
1 1/2"	4.8	Flexible	0 to 250	0.23 BTU/hr @ 75° F	1.5	Brown	Silver	ASTM E84 25/50 for Flame and Smoke	9160K22	00000	———	0	9160K23	0000000	———	0
1 1/2"	5	Flexible	0 to 250	0.26 BTU/hr @ 75° F	0.75	Brown	Silver	ASTM E84 25/50 for Flame and Smoke	9160K4	00000	———	0	———	0	9160K2	000000
2"	5.6	Flexible	0 to 250	0.27 BTU/hr @ 75° F	0.75	Brown	Silver	ASTM E84 25/50 for Flame and Smoke	9160K11	00000	———	0	9160K13	000000	———	0
2"	6	Flexible	0 to 250	0.25 BTU/hr @ 75° F	1	Brown	Silver	ASTM E84 25/50 for Flame and Smoke	9160K19	00000	———	0	9160K21	000000	———	0
2"	6.4	Flexible	0 to 250	0.23 BTU/hr @ 75° F	1.5	Brown	Silver	ASTM E84 25/50 for Flame and Smoke	9160K24	000000	9160K25	0000000	———	0	———	0
2 3/16"	6	Flexible	0 to 250	0.27 BTU/hr @ 75° F	0.75	Brown	Silver	ASTM E84 25/50 for Flame and Smoke	9160K15	00000	———	0	9160K16	000000	———	0
3"	8.4	Flexible	0 to 250	0.27 BTU/hr @ 75° F	0.75	Brown	Silver	ASTM E84 25/50 for Flame and Smoke	9160K12	00000	9160K14	000000	———	0	———	0

Tape