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    82 Products
    About Selecting Thermal Insulation
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    Compare R-value and temperature range to find the insulation material that best suits your application.

    Ceramic Fiber Insulation Sheets for Furnaces

    Image of Product. Front orientation. Insulation Sheets. Ceramic Fiber Insulation Sheets for Furnaces.
    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 1,000° F.
    Without Binder—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.
    With 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.
    Insulation
    R Value
    Heat Flow Rate
    @ Temp.
    Density,
    lb/ft³
    Flexibility
    Color
    Flammability Rating
    Each
    Without Binder
     
    1/16" Thick
    6"100Not Rated2,3000.10.43 BTU/hr @ 800° F9FlexibleWhite—93285K310000000
    12"50Not Rated2,3000.10.43 BTU/hr @ 800° F9FlexibleWhite—93285K32000000
    24"25Not Rated2,3000.10.43 BTU/hr @ 800° F9FlexibleWhite—93285K33000000
     
    1/8" Thick
    12"50Not Rated2,3000.10.43 BTU/hr @ 800° F9FlexibleWhite—93285K34000000
    24"25Not Rated2,3000.10.43 BTU/hr @ 800° F9FlexibleWhite—93285K35000000
     
    1/4" Thick
    24"20Not Rated2,1500.30.75 BTU/hr @ 800° F6FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K5100000
    24"20Not Rated2,1500.40.65 BTU/hr @ 800° F8FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K7100000
    48"20-4552,1500.30.78 BTU/hr @ 800° F6FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K113000000
    48"20-4552,1500.40.7 BTU/hr @ 800° F8FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K118000000
     
    1/2" Thick
    24"50Not Rated2,1500.70.75 BTU/hr @ 800° F6FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K82000000
    24"50Not Rated2,1500.80.65 BTU/hr @ 800° F8FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K92000000
    48"50-4552,1500.50.96 BTU/hr @ 800° F4FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K109000000
    48"50-4552,1500.60.78 BTU/hr @ 800° F6FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K114000000
    48"50-4552,1500.70.7 BTU/hr @ 800° F8FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K119000000
     
    1" Thick
    24"25-4552,4001.30.78 BTU/hr @ 800° F6FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K101000000
    24"25-4552,4001.40.7 BTU/hr @ 800° F8FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K104000000
    24"25Not Rated2,15011 BTU/hr @ 800° F4FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K3400000
    24"25Not Rated2,1501.30.75 BTU/hr @ 800° F6FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K54000000
    24"25Not Rated2,1501.50.65 BTU/hr @ 800° F8FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K74000000
    48"25-4552,15010.96 BTU/hr @ 800° F4FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K111000000
    48"25-4552,1501.30.78 BTU/hr @ 800° F6FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K115000000
    48"25-4552,1501.40.7 BTU/hr @ 800° F8FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K121000000
    48"25-4552,4001.40.7 BTU/hr @ 800° F8FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K105000000
     
    1 1/2" Thick
    24"15-4552,4002.10.7 BTU/hr @ 800° F8FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K106000000
    24"15Not Rated2,1501.51 BTU/hr @ 800° F4FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K1600000
    24"15Not Rated2,15020.75 BTU/hr @ 800° F6FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K86000000
    24"15Not Rated2,1502.30.65 BTU/hr @ 800° F8FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K96000000
    48"15-4552,1501.90.78 BTU/hr @ 800° F6FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K116000000
    48"15-4552,1502.10.7 BTU/hr @ 800° F8FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K122000000
     
    2" Thick
    24"12 1/2-4552,4002.90.7 BTU/hr @ 800° F8FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K107000000
    24"12 1/2Not Rated2,15021 BTU/hr @ 800° F4FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K1800000
    24"12 1/2Not Rated2,1502.70.75 BTU/hr @ 800° F6FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K88000000
    24"12 1/2Not Rated2,1503.10.65 BTU/hr @ 800° F8FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K98000000
    48"12 1/2-4552,1502.60.78 BTU/hr @ 800° F6FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K117000000
    48"12 1/2-4552,1502.90.7 BTU/hr @ 800° F8FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K123000000
    48"12 1/2-4552,4002.90.7 BTU/hr @ 800° F8FlexibleWhiteUL 723 0/0 for Flame and Smoke
    		93315K108000000
     
    With Binder
     
    1/16" Thick
    6"100-4252,3000.10.71 BTU/hr @ 800° F7.5FlexibleWhite—93285K22000000
    12"50-4252,3000.10.71 BTU/hr @ 800° F7.5FlexibleWhite—93285K24000000
    24"25-4252,3000.10.71 BTU/hr @ 800° F7.5FlexibleWhite—93285K26000000
     
    1/8" Thick
    6"20-4252,3000.20.71 BTU/hr @ 800° F7.5FlexibleWhite—93285K1200000
    6"100-4252,3000.20.71 BTU/hr @ 800° F7.5FlexibleWhite—93285K42000000
    12"10-4252,3000.20.71 BTU/hr @ 800° F7.5FlexibleWhite—93285K1500000
    12"50-4252,3000.20.71 BTU/hr @ 800° F7.5FlexibleWhite—93285K44000000
    24"5-4252,3000.20.71 BTU/hr @ 800° F7.5FlexibleWhite—93285K1800000
    24"25-4252,3000.20.71 BTU/hr @ 800° F7.5FlexibleWhite—93285K46000000
     
    1/4" Thick
    6"100-4252,3000.40.57 BTU/hr @ 800° F7.5FlexibleWhite—93285K62000000
    12"50-4252,3000.40.57 BTU/hr @ 800° F7.5FlexibleWhite—93285K64000000
    24"25-4252,3000.40.57 BTU/hr @ 800° F7.5FlexibleWhite—93285K66000000
     

    Fiberglass Insulation Sheets

    These lightweight, flexible fiberglass sheets are typically used to insulate equipment and appliances.
    For Enclosures and Equipment/Ovens and Furnaces
    Image of Product. Front orientation. Insulation Sheets. Fiberglass Insulation Sheets.
    0° F to 1,000° F—Sheets with temperature range of 0° to 1,000° F are suitable for use in ovens. To use outdoors, add metal jacketing (sold separately).
    Thk.
    Wd.
    Lg.,
    ft.
    Insulation
    R Value
    Flexibility
    Temp. Range,
    ° F
    Heat Flow Rate
    @ Temp.
    Density,
    lb/ft³
    Color
    Flammability Rating
    Each
    1"24"83.8Flexible0 to 1,0000.26 BTU/hr @ 75° F2.4GrayASTM E84 25/50 for Flame and Smoke
    		9356K11000000
    1 1/2"24"85.8Flexible0 to 1,0000.26 BTU/hr @ 75° F2.4GrayASTM E84 25/50 for Flame and Smoke
    		9356K1200000
    2"24"87.7Flexible0 to 1,0000.26 BTU/hr @ 75° F2.4GrayASTM E84 25/50 for Flame and Smoke
    		9356K1300000

    Rigid Silica High-Efficiency Insulation Sheets for Furnaces

    Image of Product. Front orientation. Insulation Sheets. Rigid Silica High-Efficiency Insulation Sheets for Furnaces.
    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 1,000° F.
    Thk.
    Wd.
    Lg.
    Max. Temp.,
    ° F
    Insulation
    R Value
    Heat Flow Rate @ Temp.
    Density,
    lb/ft³
    Color
    Flexibility
    Each
    3/16"19 1/2"23 1/2"1,7401.20.31 BTU/hr @ 1,470° F16WhiteRigid6841K11000000
    1/4"19 1/2"23 1/2"1,7401.20.31 BTU/hr @ 1,470° F16WhiteRigid6841K2100000
    3/8"25 1/2"39"1,832Not Rated0.033 BTU/hr @ 1,470° F17GrayRigid6841K33000000
    3/4"25 1/2"39"1,832Not Rated0.033 BTU/hr @ 1,470° F17GrayRigid6841K43000000
    1"25 1/2"39"1,832Not Rated0.033 BTU/hr @ 1,470° F17GrayRigid6841K53000000

    Acid-Resistant Silica Insulation Sheets for Furnaces

    Commonly used in furnaces and engine compartments, these flexible silica fiber sheets resist corrosive acids. They perform best at temperatures above 1,000° F.
    10 lb/ft³ Density
    Image of Product. Front orientation. Insulation Sheets. Acid-Resistant Silica Insulation Sheets for Furnaces.
    Wd.
    Insulation
    R Value
    Flexibility
    Temp. Range,
    ° F
    Heat Flow Rate
    @ Temp.
    Color
    Performance
    Choose a Length, ft.
    Per
    Ft.
    1/4" Thick
    36"0.3Flexible0 to 2,0000.78 BTU/hr @ 800° FWhiteAcid Resistant2, 10, 2593435K41000000
     
    1/2" Thick
    36"0.6Flexible0 to 2,0000.78 BTU/hr @ 800° FWhiteAcid Resistant2, 10, 2593435K4300000
     
    1" Thick
    36"1.3Flexible0 to 2,0000.78 BTU/hr @ 800° FWhiteAcid Resistant2, 10, 2593435K4500000
     

    Shock-Resistant Ceramic Fiber Insulation Sheets for Furnaces

    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 1,000° F.
    18 lb/ft³ Density
    Image of Product. Front orientation. Insulation Sheets. Shock-Resistant Ceramic Fiber Insulation Sheets for Furnaces.
    With Binder—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.
    Without Binder—Sheet without binder won't produce smoke when heated.
    With Binder
    Without Binder
    Wd.
    Lg.,
    ft.
    Insulation
    R Value
    Flexibility
    Temp. Range,
    ° F
    Heat Flow Rate
    @ Temp.
    Color
    Performance
    Flammability Rating
    Each
    Each
    1" Thick
    24"31.2Rigid0 to 2,3000.85 BTU/hr @ 1,000° FOff-WhiteFlame Resistant, Shock ResistantASTM E84 0/0 for Flame and Smoke
    		93595K7300000093595K75000000
     

    Moldable Ceramic Insulation Sheets for Furnaces

    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 1,000° F.
    75 lb/ft³ Density
    Image of Product. Front orientation. Insulation Sheets. Moldable Ceramic Insulation Sheets for Furnaces.
    Wd.
    Lg.,
    ft.
    Insulation
    R Value
    Flexibility
    Temp. Range,
    ° F
    Heat Flow Rate
    @ Temp.
    Color
    Each
    1/32" Thick
    23"20.1Rigid-120 to 2,7301.2 BTU/hr @ 1,200° FWhite93615K110000000
     
    1/16" Thick
    23"20.1Rigid-120 to 2,7301.2 BTU/hr @ 1,200° FWhite93615K14000000
     
    1/8" Thick
    23"20.1Rigid-120 to 2,7301.2 BTU/hr @ 1,200° FWhite93615K16000000
     
    1/4" Thick
    23"20.2Rigid-120 to 2,7301.2 BTU/hr @ 1,200° FWhite93615K18000000
     

    Graphite Insulation Sheets for Furnaces

    Image of Product. Front orientation. Insulation Sheets. Graphite Insulation Sheets for Furnaces.
    Insulate high-vacuum furnaces and other low-oxygen vacuum enclosures with these flexible sheets. These sheets withstand higher temperatures when used in a vacuum.
    2 ft. Long
    4 ft. Long
    Thk.
    Wd.
    Insulation
    R Value
    Flexibility
    Max. Temp.,
    ° F
    Heat Flow Rate
    @ Temp.
    Density,
    lb/ft³
    Color
    Max. Temp. in
    a Vacuum, ° F
    Each
    Each
    1/4"24"Not RatedFlexible7500.2 BTU/hr @ 2,550° F7.49Black4,3504579N1100000004579N120000000
    1/2"24"Not RatedFlexible7500.2 BTU/hr @ 2,550° F7.49Black4,3504579N130000004579N14000000

    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 1,000° F.
    2,000° F Maximum Temperature
    Image of Product. Front orientation. Insulation Sheets. Ultra-Thin Rigid Millboard Insulation Sheets for Furnaces.
    Thk.
    Wd.
    Lg.
    Insulation
    R Value
    Flexibility
    Heat Flow Rate
    @ Temp.
    Density,
    lb/ft³
    Color
    Each
    1/16"55"55"0.1Rigid0.73 BTU/hr @ 800° F37.5White9390K11000000
    1/8"55"55"0.2Rigid0.73 BTU/hr @ 800° F37.5White9390K12000000
    3/16"55"55"0.3Rigid0.73 BTU/hr @ 800° F37.5White9390K13000000
    1/4"55"55"0.3Rigid0.73 BTU/hr @ 800° F37.5White9390K14000000

    Thermally Stable Composite Paper Insulation Sheets

    Image of Product. Front orientation. Insulation Sheets. Thermally Stable Composite Paper Insulation Sheets.
    Made of flexible composite paper, these sheets won't shrink or lose shape in the high temperatures of air furnaces and hot water tanks.
    5 ft. Long
    10 ft. Long
    20 ft. Long
    Thk.
    Wd.
    Insulation
    R Value
    Flexibility
    Max. Temp.,
    ° F
    Heat Flow Rate
    @ Temp.
    Density,
    lb/ft³
    Color
    Flammability
    Rating
    Each
    Each
    Each
    1/8"16"0.6Flexible1,1000.22 BTU/hr @ 75° F8.7WhiteUL 94 V-0
    		9323K110000009323K210000009323K160000000
    1/8"24"0.6Flexible1,1000.22 BTU/hr @ 75° F8.7WhiteUL 94 V-0
    		9323K12000009323K14000009323K17000000
    1/8"48"0.6Flexible1,1000.22 BTU/hr @ 75° F8.7WhiteUL 94 V-0
    		9323K130000009323K150000009323K18000000
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