Duct Insulation | McMaster-Carr

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1.93 BTU/hr @ 1,500° F

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Insulation R Value

REACH

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FAA Compliant 14 CFR 25.853

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Vibration Reduced

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Damping Loss Factor (DLF)

87 Products

About Selecting Thermal Insulation

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

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

		Each
Reinforced HVAC Tape With Paper Liner and Foil Facing	76145A19	000000

Vinyl Plastic Facing

Sheets with vinyl plastic facing are tear resistant.

							10 ft. × 48"		100 ft. × 48"
Thk.	Insulation R Value	Flexibility	Heat Flow Rate @ Temp.	Density, lb/ft³	Color	Facing Color		Each		Each
2"	7.7	Flexible	0.26 BTU/hr @ 75° F	0.95	Yellow	White	9330K82	000000	9330K62	0000000

Tape

		Each
Reinforced HVAC Tape With Paper Liner and Foil Facing	76145A19	000000

Heat-Reflecting Air Bubble Insulation Sheets for Ducts

Polyethylene—Typically used as duct wrap, these flexible sheets consist of polyethylene bubbles covered with aluminized polyester fabric that prevent 96% of heat from radiating into or away from duct. Use on rectangular and round ductwork.

										25 ft. Long		50 ft. Long		75 ft. Long		100 ft. Long
	Wd.	Insulation R Value	Flexibility	Temp. Range, ° F	Heat Flow Rate @ Temp.	Color	Flammability Rating	Material	Facing Material		Each		Each		Each		Each
5/16" Thick



		24"	4.2	Flexible	-60 to 180	Not Rated	Silver	ASTM E84 20/30 for Flame and Smoke	Polyethylene	Aluminized Polyester Fabric	9367K33	000000	9367K34	000000	9367K44	000000	9367K54	0000000


		36"	4.2	Flexible	-60 to 180	Not Rated	Silver	ASTM E84 20/30 for Flame and Smoke	Polyethylene	Aluminized Polyester Fabric	9367K65	00000	9367K66	000000	9367K76	000000	9367K86	000000
		48"	4.2	Flexible	-60 to 180	Not Rated	Silver	ASTM E84 20/30 for Flame and Smoke	Polyethylene	Aluminized Polyester Fabric	9367K21	00000	9367K22	000000	9367K23	000000	9367K24	000000

Spacers

Thk.	Wd.	Lg., ft.		Each
5/16"	2"	25	9367K25	00000

Vibration-Damping Sheets

Install these adhesive-back sheets to reduce noise from vibrating surfaces, such as duct and equipment housings.

Acrylic Plastic—Acrylic plastic sheets have an aluminum surface layer that helps resist corrosion. Plastic sheets resist oil and grease.

Butyl—Butyl sheets have an aluminum surface layer that helps resist corrosion.

EVA, PVC, and Vinyl Plastic—Plastic sheets resist oil and grease.

						Temp. Range, ° F
	Vibration Reduced	Thk.	Wd.	Material	Color	Min.	Max.	Flammability Rating	Lg., ft.		Each
Adhesive Backing



		10%	1/16"	32"	EVA	Black	15	175	UL 94 HB	4 1/2	9709T39	000000


		13%	3/64"	24"	Vinyl Plastic	Black	Not Rated	125	UL 94 HF-1, UL 94 V-0	4 1/2	9709T26	00000
		22%	1/64"	24"	Acrylic Plastic	Silver	-40	175	—	4	9709T45	00000
		26%	1/32"	48"	Urethane Foam	Black	0	160	FMVSS No. 302, UL 94 V-0	4 1/2	9709T68	00000
		39%	1/16"	48"	Polyurethane Foam	Gray	15	140	FMVSS No. 302, UL 94 V-0	4 1/2	9709T28	000000
		52%	1/8"	48"	PVC	Blue	32	125	FMVSS No. 302, UL 94 HB	4 1/2	9709T57	000000
		70%	5/64"	24"	Vinyl Plastic	Black	-20	190	FMVSS No. 302, UL 94 HB	4 1/2	9709T65	00000
		70%	5/64"	40"	Vinyl Plastic	Black	-20	190	FMVSS No. 302, UL 94 HB	4 1/2	9709T66	00000
		90%	3/64"	24"	PVC	Black	-40	225	FMVSS No. 302, UL 94 HBF	4 1/2	9709T72	00000
		90%	1/16"	24"	PVC	Black	-40	225	FMVSS No. 302, UL 94 HBF	4 1/2	9709T71	000000
		91%	1/16"	12"	Butyl	Gray	-40	225	FMVSS No. 302	3 3/4	9709T29	00000

Rigid Fiberglass Insulation Sheets for Ducts


Foil Facing	Kraft Paper 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).

Kraft Paper Facing—To seal sheets with kraft paper facing, use reinforced insulation tape (sold separately).

										Facing		Foil Facing		Kraft Paper Facing
	Thk.	Wd.	Lg., ft.	Insulation R Value	Flexibility	Temp. Range, ° F	Heat Flow Rate @ Temp.	Color	Flammability Rating	Temperature, ° F	Color		Each		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	———	0


		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	White	———	0	9350K4	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	———	0
		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	White	———	0	9350K5	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	———	0
		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	White	———	0	9350K6	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	———	0


				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	———	0
				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	White	———	0	9351K5	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	———	0
				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	White	———	0	9351K6	00000

Tape

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

Flame-Resistant Flexible Synthetic Fiber Insulation Sheets for Ducts

Also known as fire wrap, these flame-resistant sheets meet ASTM E84 0/0 for flame and smoke and create a fire barrier around rectangular and round ductwork. They are often used to wrap kitchen grease exhaust ducts and air ducts.

									25 ft. × 24"		25 ft. × 48"
Thk.	Insulation R Value	Flexibility	Max. Temp., ° F	Heat Flow Rate @ Temp.	Density, lb/ft³	Color	Facing Color	Flammability Rating		Each		Each
1 1/2"	6.3	Flexible	1,830	1.93 BTU/hr @ 1,500° F	6	White	Silver	ASTM E84 0/0 for Flame and Smoke	2689N101	0000000	2689N102	0000000

Tape

		Each
Reinforced HVAC Tape	7620A11	000000

Vibration-Damping Coatings


Sprays	Liquids

Cannot Be Sold To—Coatings that cannot be sold to California are restricted due to VOC (Volatile Organic Compounds) regulations.

Container Size, fl. oz.	Form	Approx. Coverage Area, ft²	Max. Temp., ° F	Color	Cannot Be Sold To		Each
18	Spray	20	250	Black	California	9545T5	000000
32	Liquid	10	250	Gray	—	9545T2	00000

Vibration-Damping Foam Tape for Floor Joists

Quiet squeaky floor joists and reduce vibration with this foam tape. The closed-cell foam restricts absorption.

									20 ft. Long		100 ft. Long
Wd.	Overall Thk.	Facing Material	Adhesive Type	Temp. Range, ° F	Cell Type	Tensile Strength	Adhesion to Steel	Color		Each		Each
1"	0.125"	PET	Acrylic	-20 to 160	Closed	Not Rated	Not Rated	Green	7970A12	00000	7970A11	000000
1 1/2"	0.125"	PET	Acrylic	-20 to 160	Closed	Not Rated	Not Rated	Green	7970A22	00000	7970A21	00000
2"	0.125"	PET	Acrylic	-20 to 160	Closed	Not Rated	Not Rated	Green	7970A28	00000	7970A26	00000
3"	0.125"	PET	Acrylic	-20 to 160	Closed	Not Rated	Not Rated	Green	7970A34	00000	7970A32	00000

Vibration-Damping Foil Tape

Control the unwanted noise that comes from vibrating panels and support structures. This aluminum foil tape reduces vibration by converting it into a small amount of heat.

Wd.	Lg., ft.	Overall Thk.	Material	Adhesive Type	Temp. Range, ° F	Tensile Strength, lbf/in. wd.	Adhesion to Steel, ozf/in. wd.	Flammability Rating	Color		Each
1"	15	0.015"	Aluminum	Acrylic	35 to 140	125	65	FAA Compliant 14 CFR 25.853	Silver	6307A21	000000
2"	15	0.015"	Aluminum	Acrylic	35 to 140	125	65	FAA Compliant 14 CFR 25.853	Silver	6307A22	00000
2"	108	0.015"	Aluminum	Acrylic	35 to 140	125	65	FAA Compliant 14 CFR 25.853	Silver	6307A11	000000

Vibration-Damping Velvet Tape

Low-pile velvet cushions surfaces and absorbs sound. Use it between parts and in acoustic applications.

Wd.	Lg., ft.	Overall Thk.	Material	Adhesive Type	Temp. Range, ° F	Tensile Strength, lbf/in. wd.	Adhesion to Steel, ozf/in. wd.	Color
1"	15	0.022"	Velvet	Acrylic	-30 to 240	30	60	Black	1653N1
2"	15	0.022"	Velvet	Acrylic	-30 to 240	30	60	Black	1653N11
4"	15	0.022"	Velvet	Acrylic	-30 to 240	30	60	Black	1653N12
6"	15	0.022"	Velvet	Acrylic	-30 to 240	30	60	Black	1653N13

Vibration-Damping Flocking Tape

Reduce vibrations and squeaks between parts with this abrasion-resistant flocked tape. The acrylic adhesive sticks even on hard-to-bond plastics.

								15 ft. Long		240 ft. Long
Wd.	Overall Thk.	Material	Adhesive Type	Max. Temp., ° F	Tensile Strength	Adhesion to Steel, ozf/in. wd.	Color		Each		Each
1/2"	0.036"	Cotton Fabric, Polyester Plastic	Acrylic	200	Not Rated	140	Black	7417A2	00000	7417A16	000000
3/4"	0.036"	Cotton Fabric, Polyester Plastic	Acrylic	200	Not Rated	140	Black	7417A11	0000	7417A17	000000
1"	0.036"	Cotton Fabric, Polyester Plastic	Acrylic	200	Not Rated	140	Black	7417A3	00000	7417A18	000000
1 1/2"	0.036"	Cotton Fabric, Polyester Plastic	Acrylic	200	Not Rated	140	Black	7417A12	00000	7417A19	000000
2"	0.036"	Cotton Fabric, Polyester Plastic	Acrylic	200	Not Rated	140	Black	7417A4	00000	———	0
3"	0.036"	Cotton Fabric, Polyester Plastic	Acrylic	200	Not Rated	140	Black	7417A5	00000	———	0
4"	0.036"	Cotton Fabric, Polyester Plastic	Acrylic	200	Not Rated	140	Black	7417A13	00000	———	0
6"	0.036"	Cotton Fabric, Polyester Plastic	Acrylic	200	Not Rated	140	Black	7417A14	00000	———	0