Insulation Type Insulation Type |
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Flexibility Flexibility |
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Maximum Temperature Maximum Temperature |
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For Use On For Use On |
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Facing Material Facing Material |
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Specifications Met Specifications Met |
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Heat Flow Rate Heat Flow Rate |
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Density Density |
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Approximate Coverage Approximate Coverage |
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About Selecting Thermal Insulation
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Flexible Fiberglass Duct Insulation Sheets
Wrap rectangular and round ductwork with this flexible insulation. Seal with reinforced HVAC tape (not included).
Sheets with foil facing reflect heat. The foil facing is also known as foil scrim kraft (FSK).
Sheets with vinyl facing are tear resistant.
- Temperature Range: 0° to 250° F
- Heat Flow Rate: 0.26 Btu @ 75° F
- Color: Brown
- Facing Color: Silver
- Specifications Met: ASTM E84 25/50 for Flame and Smoke
| Thick. | R Value | Flexibility | Each | |
10 ft. × 48" | ||||
|---|---|---|---|---|
| 1 1/2" | 4.5 | Flexible | 0000000 | 000000 |
| 1 1/2" | 4.8 | Flexible | 0000000 | 00000 |
| 1 1/2" | 5 | Flexible | 000000 | 00000 |
| 2" | 5.6 | Flexible | 0000000 | 00000 |
| 2" | 6 | Flexible | 0000000 | 00000 |
| 2" | 6.4 | Flexible | 0000000 | 00000 |
| 2 3/16" | 6 | Flexible | 0000000 | 00000 |
| 3" | 8.4 | Flexible | 0000000 | 00000 |
50 ft. × 48" | ||||
| 2" | 6.4 | Flexible | 0000000 | 000000 |
| 3" | 8.4 | Flexible | 0000000 | 000000 |
75 ft. × 48" | ||||
| 1 1/2" | 4.8 | Flexible | 0000000 | 000000 |
| 2" | 5.6 | Flexible | 0000000 | 000000 |
| 2" | 6 | Flexible | 0000000 | 000000 |
| 2 3/16" | 6 | Flexible | 0000000 | 000000 |
100 ft. × 48" | ||||
| 1 1/2" | 4.5 | Flexible | 0000000 | 000000 |
| 1 1/2" | 5 | Flexible | 000000 | 000000 |
| Reinforced HVAC Tape | 00000000 | Each | 00000 |
Heat-Reflecting Air Bubble Duct Insulation Sheets
- Temperature Range: -60° to 180° F
- Heat Flow Rate: Not Rated
- Density: Not Rated
- Color: Silver
- Specifications Met: ASTM E84 20/30 for Flame and Smoke
Typically used as duct wrap, these flexible sheets consist of polyethylene bubbles covered with aluminum polyester foil that prevent 96% of heat from radiating into or away from duct. Use on rectangular and round ductwork.
| Wd. | R Value | Flexibility | Each | |
25 ft. Lg. | ||||
|---|---|---|---|---|
5/16" Thick. | ||||
| 24" | 4.2 | Flexible | 0000000 | 000000 |
| 36" | 4.2 | Flexible | 0000000 | 00000 |
| 48" | 4.2 | Flexible | 0000000 | 00000 |
50 ft. Lg. | ||||
5/16" Thick. | ||||
| 24" | 4.2 | Flexible | 0000000 | 00000 |
| 36" | 4.2 | Flexible | 0000000 | 00000 |
| 48" | 4.2 | Flexible | 0000000 | 000000 |
75 ft. Lg. | ||||
5/16" Thick. | ||||
| 24" | 4.2 | Flexible | 0000000 | 00000 |
| 36" | 4.2 | Flexible | 0000000 | 000000 |
| 48" | 4.2 | Flexible | 0000000 | 000000 |
100 ft. Lg. | ||||
5/16" Thick. | ||||
| 24" | 4.2 | Flexible | 0000000 | 000000 |
| 36" | 4.2 | Flexible | 0000000 | 000000 |
| 48" | 4.2 | Flexible | 0000000 | 000000 |
Spacers installed between the duct and air bubble insulation sheet increase the R-value to 6. One spacer roll covers approximately 10 ft. of 8" duct.
| Thick. | Wd. | Lg., ft. | Each | |
| 5/16" | 2" | 25 | 0000000 | 00000 |
Rigid Fiberglass Duct Insulation Sheets
- Temperature Range: 0° to 450° F
- Facing Temperature Range: 0° to 150° F
- Heat Flow Rate: 0.23 Btu @ 75° F
- Density: See table
- Color: Yellow
- Facing Color:
Foil Facing: Silver;
Kraft Paper Facing: White - Specifications Met: ASTM E84 25/50 for Flame and Smoke
Insulate rectangular ductwork.
Sheets with foil facing reflect heat. The foil facing is also known as foil scrim kraft (FSK). Seal with reinforced HVAC tape (sold separately).
To seal sheets with kraft paper facing, use reinforced insulation tape (sold separately).
Sheets with Foil Facing | Sheets with Kraft Paper Facing | |||||||
|---|---|---|---|---|---|---|---|---|
| Thick. | Wd. | Lg., ft. | R Value | Flexibility | Each | Each | ||
3 lbs./cu. ft. Density | ||||||||
| 1" | 24" | 4 | 4.3 | Rigid | 000000 | 000000 | 000000 | 000000 |
| 1 1/2" | 24" | 4 | 6.5 | Rigid | 000000 | 00000 | 000000 | 00000 |
| 2" | 24" | 4 | 8.7 | Rigid | 000000 | 00000 | 000000 | 00000 |
6 lbs./cu. ft. Density | ||||||||
| 1" | 24" | 4 | 4.3 | Rigid | 000000 | 00000 | 000000 | 00000 |
| 1 1/2" | 24" | 4 | 6.5 | Rigid | 000000 | 00000 | 000000 | 00000 |
| 2" | 24" | 4 | 8.7 | Rigid | 000000 | 00000 | 000000 | 00000 |
Flame-Resistant Flexible Synthetic
Fiber Duct Insulation Sheets
- Max. Temperature: 1830° F
- Heat Flow Rate: 1.93 Btu @ 1500° F
- Density: 6 lbs./cu. ft.
- Color: White
- Facing Color: Silver
- Specifications Met: ASTM E84 0/0 for Flame and Smoke
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. Seal with reinforced HVAC tape (sold separately).
Acid-Resistant Silica Insulation Sheets for Furnaces
- Temperature Range: 0° to 2000° F
- Heat Flow Rate: 0.78 Btu @ 800° F
- Density: 10 lbs./cu. ft.
- Color: White
Commonly used in furnaces and engine compartments, these flexible silica fiber sheets resist corrosive acids. They perform best at temperatures above 1000° F.
Vibration Damping Sheets
Install these adhesive-back sheets to reduce noise from vibrating surfaces, such as duct and equipment housings.
Acrylic Plastic and Butyl Rubber sheets have an aluminum surface layer that helps resist corrosion.
Plastic sheets resist oil and grease.
| Vibration Reduced | Thick. | Wd. | Material | Color | Temp. Range, °F | Specifications Met | Lg., ft. | Each | |
Adhesive Backing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 10% | 1/16" | 32" | EVA Plastic | Black | Not Rated to 125° | UL 94HB | 4 1/2 | 0000000 | 000000 |
| 13% | 3/64" | 24" | Vinyl Plastic | Black | Not Rated to 125° | UL 94HF1, UL 94V0 | 4 1/2 | 0000000 | 00000 |
| 22% | 1/64" | 24" | Acrylic Plastic | Silver | -40° to 175° | __ | 4 | 0000000 | 00000 |
| 39% | 1/16" | 48" | Polyurethane Foam | Gray | 15° to 140° | FMVSS-302, UL 94V0 | 4 1/2 | 0000000 | 00000 |
| 91% | 1/16" | 12" | Butyl Rubber | Gray | -40° to 225° | FMVSS-302 | 3 3/4 | 0000000 | 00000 |
Vibration Damping Coatings
Apply these coatings to irregular shapes and large areas and reduce noise caused by vibration. Keep applying coats until desired noise reduction is achieved.