About Selecting Thermal Insulation
More
Ceramic Fiber Insulation Sheets for Furnaces
- Temperature Range: See table
- Heat Flow Rate: See table
- Density: See table
- Color: White
- Specifications Met: See table
The most common of our flexible high-temperature sheets, these are used to insulate furnaces. They also can be fabricated into gaskets. Insulation performs best at temperatures above 1000° F.
Sheets without binder don’t have a binder that can burn when installed, so they won’t produce a strong odor. They’re often used to vacuum heat treat furnaces. However, they’re weaker and more brittle than sheets with a binder.
Sheets with binder are stronger in structure, easier to cut, and more pliable than those without a binder. The binder will burn out at 350° and release gas with a strong odor, so only use them in applications where burnout is not an issue.
Temperature, °F | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Wd. | Lg., ft. | Min. | Max. | R Value | Heat Flow Rate | Density, lbs./cu. ft. | Flexibility | Specifications Met | Each | |
Without Binder | ||||||||||
1/16" Thick. | ||||||||||
| 6" | 100 | Not Rated | 2300° | 0.1 | 0.43 Btu @ 800° F | 9 | Flexible | __ | 00000000 | 0000000 |
| 12" | 50 | Not Rated | 2300° | 0.1 | 0.43 Btu @ 800° F | 9 | Flexible | __ | 00000000 | 000000 |
| 24" | 25 | Not Rated | 2300° | 0.1 | 0.43 Btu @ 800° F | 9 | Flexible | __ | 00000000 | 000000 |
1/8" Thick. | ||||||||||
| 12" | 50 | Not Rated | 2300° | 0.1 | 0.43 Btu @ 800° F | 9 | Flexible | __ | 00000000 | 000000 |
| 24" | 25 | Not Rated | 2300° | 0.1 | 0.43 Btu @ 800° F | 9 | Flexible | __ | 00000000 | 000000 |
1/4" Thick. | ||||||||||
| 24" | 20 | Not Rated | 2150° | 0.3 | 0.75 Btu @ 800° F | 6 | Flexible | UL 723 0/0 for Flame and Smoke | 00000000 | 00000 |
| 24" | 20 | Not Rated | 2150° | 0.4 | 0.65 Btu @ 800° F | 8 | Flexible | UL 723 0/0 for Flame and Smoke | 00000000 | 00000 |
| 48" | 20 | -455° | 2150° | 0.3 | 0.78 Btu @ 800° F | 6 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
| 48" | 20 | -455° | 2150° | 0.4 | 0.7 Btu @ 800° F | 8 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
1/2" Thick. | ||||||||||
| 24" | 50 | Not Rated | 2150° | 0.7 | 0.75 Btu @ 800° F | 6 | Flexible | UL 723 0/0 for Flame and Smoke | 00000000 | 000000 |
| 24" | 50 | Not Rated | 2150° | 0.8 | 0.65 Btu @ 800° F | 8 | Flexible | UL 723 0/0 for Flame and Smoke | 00000000 | 000000 |
| 48" | 50 | -455° | 2150° | 0.5 | 0.96 Btu @ 800° F | 4 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
| 48" | 50 | -455° | 2150° | 0.6 | 0.78 Btu @ 800° F | 6 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
| 48" | 50 | -455° | 2150° | 0.7 | 0.7 Btu @ 800° F | 8 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
1" Thick. | ||||||||||
| 24" | 25 | Not Rated | 2150° | 1 | 1 Btu @ 800° F | 4 | Flexible | UL 723 0/0 for Flame and Smoke | 00000000 | 000000 |
| 24" | 25 | Not Rated | 2150° | 1.3 | 0.75 Btu @ 800° F | 6 | Flexible | UL 723 0/0 for Flame and Smoke | 00000000 | 000000 |
| 24" | 25 | Not Rated | 2150° | 1.5 | 0.65 Btu @ 800° F | 8 | Flexible | UL 723 0/0 for Flame and Smoke | 00000000 | 000000 |
| 24" | 25 | -455° | 2400° | 1.3 | 0.78 Btu @ 800° F | 6 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
| 24" | 25 | -455° | 2400° | 1.4 | 0.7 Btu @ 800° F | 8 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
| 48" | 25 | -455° | 2150° | 1 | 0.96 Btu @ 800° F | 4 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
| 48" | 25 | -455° | 2150° | 1.3 | 0.78 Btu @ 800° F | 6 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
| 48" | 25 | -455° | 2150° | 1.4 | 0.7 Btu @ 800° F | 8 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
| 48" | 25 | -455° | 2400° | 1.4 | 0.7 Btu @ 800° F | 8 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
1 1/2" Thick. | ||||||||||
| 24" | 15 | Not Rated | 2150° | 1.5 | 1 Btu @ 800° F | 4 | Flexible | UL 723 0/0 for Flame and Smoke | 00000000 | 00000 |
| 24" | 15 | Not Rated | 2150° | 2 | 0.75 Btu @ 800° F | 6 | Flexible | UL 723 0/0 for Flame and Smoke | 00000000 | 000000 |
| 24" | 15 | Not Rated | 2150° | 2.3 | 0.65 Btu @ 800° F | 8 | Flexible | UL 723 0/0 for Flame and Smoke | 00000000 | 000000 |
| 24" | 15 | -455° | 2400° | 2.1 | 0.7 Btu @ 800° F | 8 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
| 48" | 15 | -455° | 2150° | 1.9 | 0.78 Btu @ 800° F | 6 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
| 48" | 15 | -455° | 2150° | 2.1 | 0.7 Btu @ 800° F | 8 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
2" Thick. | ||||||||||
| 24" | 12 1/2 | Not Rated | 2150° | 2 | 1 Btu @ 800° F | 4 | Flexible | UL 723 0/0 for Flame and Smoke | 00000000 | 000000 |
| 24" | 12 1/2 | Not Rated | 2150° | 2.7 | 0.75 Btu @ 800° F | 6 | Flexible | UL 723 0/0 for Flame and Smoke | 00000000 | 000000 |
| 24" | 12 1/2 | Not Rated | 2150° | 3.1 | 0.65 Btu @ 800° F | 8 | Flexible | UL 723 0/0 for Flame and Smoke | 00000000 | 000000 |
| 24" | 12 1/2 | -455° | 2400° | 2.9 | 0.7 Btu @ 800° F | 8 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
| 48" | 12 1/2 | -455° | 2150° | 2.6 | 0.78 Btu @ 800° F | 6 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
| 48" | 12 1/2 | -455° | 2150° | 2.9 | 0.7 Btu @ 800° F | 8 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
| 48" | 12 1/2 | -455° | 2400° | 2.9 | 0.7 Btu @ 800° F | 8 | Flexible | UL 723 0/0 for Flame and Smoke | 000000000 | 000000 |
With Binder | ||||||||||
1/16" Thick. | ||||||||||
| 6" | 100 | -425° | 2300° | 0.1 | 0.71 Btu @ 800° F | 7.5 | Flexible | __ | 00000000 | 000000 |
| 12" | 50 | -425° | 2300° | 0.1 | 0.71 Btu @ 800° F | 7.5 | Flexible | __ | 00000000 | 000000 |
| 24" | 25 | -425° | 2300° | 0.1 | 0.71 Btu @ 800° F | 7.5 | Flexible | __ | 00000000 | 000000 |
1/8" Thick. | ||||||||||
| 6" | 20 | -425° | 2300° | 0.2 | 0.71 Btu @ 800° F | 7.5 | Flexible | __ | 00000000 | 00000 |
| 6" | 100 | -425° | 2300° | 0.2 | 0.71 Btu @ 800° F | 7.5 | Flexible | __ | 00000000 | 000000 |
| 12" | 10 | -425° | 2300° | 0.2 | 0.71 Btu @ 800° F | 7.5 | Flexible | __ | 00000000 | 00000 |
| 12" | 50 | -425° | 2300° | 0.2 | 0.71 Btu @ 800° F | 7.5 | Flexible | __ | 00000000 | 000000 |
| 24" | 5 | -425° | 2300° | 0.2 | 0.71 Btu @ 800° F | 7.5 | Flexible | __ | 00000000 | 00000 |
| 24" | 25 | -425° | 2300° | 0.2 | 0.71 Btu @ 800° F | 7.5 | Flexible | __ | 00000000 | 000000 |
1/4" Thick. | ||||||||||
| 6" | 100 | -425° | 2300° | 0.4 | 0.57 Btu @ 800° F | 7.5 | Flexible | __ | 00000000 | 000000 |
| 12" | 50 | -425° | 2300° | 0.4 | 0.57 Btu @ 800° F | 7.5 | Flexible | __ | 00000000 | 000000 |
| 24" | 25 | -425° | 2300° | 0.4 | 0.57 Btu @ 800° F | 7.5 | Flexible | __ | 00000000 | 000000 |
Fiberglass Insulation Sheets
These lightweight, flexible fiberglass sheets are typically used to insulate equipment and appliances.
For technical drawings and 3-D models, click on a part number.
- Temperature Range: 0° to 1000° F
- Heat Flow Rate: See table
- Density: 2.4 lbs./cu. ft.
- Color: Gray
- Specifications Met: ASTM E84 25/50 for Flame and Smoke
Sheets with temperature range of 0° to 1000° F are suitable for use in ovens. To use outdoors, add metal jacketing (sold separately).
Rigid Silica Ultra-Insulation Sheets for Furnaces
- Max. Temperature: 1740° F
- Heat Flow Rate: 0.31 Btu @ 1470° F
- Density: 16 lbs./cu. ft.
- Color: See Table
Typically used in ovens and furnaces, these are the most efficient of our rigid high-temperature insulation sheets. Please note that they require special care when installing since the crumbly material is difficult to work with and will crack easily. Sheets lose strength over time and are intended to be installed behind another facing or insulation material. They resist damage from fire and moisture. Insulation performs best at temperatures above 1000° F.
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.
Thermal-Shock-Resistant Ceramic Fiber Insulation Sheets for Furnaces
- Temperature Range: 0° to 2300° F
- Heat Flow Rate: 0.85 Btu @ 1000° F
- Density: 18 lbs./cu. ft.
- Color: Off-White
- Specifications Met: ASTM E84 0/0 for Flame and Smoke
Designed for fluctuating, high-temperature applications, these semi-rigid sheets are typically used in furnaces and fire protection applications. They experience very little shrinkage at high temperatures, but the brittle material can be somewhat difficult to work with. Insulation is flame resistant, meeting ASTM E84 0/0 for flame and smoke. It performs best at temperatures above 1000° F.
Sheet with binder is easier to handle at room temperature than sheet without a binder, but it contains a small amount of organic material that burns off and releases smoke at around 400° F.
Sheet without binder won't produce smoke when heated.
Thermally Stable Composite Paper Insulation Sheets
- Max. Temperature: 1100° F
- Heat Flow Rate: 0.22 Btu @ 75° F
- Density: 8.7 lbs./cu. ft.
- Color: White
- Specifications Met: UL 94 V-0
Made of flexible composite paper, these sheets won't shrink or lose shape in the high temperatures of air furnaces and hot water tanks.
Ultra-Thin Rigid Millboard Insulation Sheets for Furnaces
Thinner than most rigid insulation for furnaces and other high-heat applications, these millboard sheets are also used for gasket fabrication. Insulation performs best at temperatures above 1000° F.
Moldable Ceramic Insulation Sheets for Furnaces
- Temperature Range: -120° F to 2730° F
- Heat Flow Rate: 1.2 Btu @ 1200° F
- Density: 75 lbs./cu. ft.
- Color: White
Wet these rigid sheets and they become formable. They can be molded multiple times until exposed to heat, which causes them to become rigid again. Insulation performs best at temperatures above 1000° F.
For technical drawings and 3-D models, click on a part number.
Graphite Insulation Sheets for Furnaces
- Max. Temperature: 750° F
- Heat Flow Rate: 0.2 Btu @ 2550° F
- Density: 7.49 lbs./cu. ft.
- Color: Black
- Max. Temperature in a Vacuum: 4350° F
Insulate high-vacuum furnaces and other low-oxygen vacuum enclosures with these flexible sheets. These sheets withstand higher temperatures when used in a vacuum.
Thermally Shock-Resistant Mullite Ceramic Sheets
- Color: Beige
- Maximum Temperature: 3,100° F
- Fabrication: Fired
- Dielectric Strength: 250V/mil
- Porosity: 13%
- Compressive Strength: 150,000psi
Often used as kiln shelves and refractory bricks, you can repeatedly move these mullite ceramic sheets between very hot and cold environments without deforming or cracking. All of these sheets are fully fired and seal out air and gas in high temperature applications, similar to nonporous alumina sheets. They also stand up to corrosion from chemicals, including acids that form while metal working. These sheets can even be used as electrical insulation.
For technical drawings and 3-D models, click on a part number.