All Categories > Industrial Products > Ceramic Fiber Insulation & Accessories > Board Products > 1401 Millboard (2300ºF Millboard and Gasketing Material)  
    Printable Page     Email Email This Page     Save To Favorites Save To Favorites

1401 Millboard (2300ºF Millboard and Gasketing Material)

ULTRA TEMP 1401 MILLBOARD is a strong, thin, dense board with excellent insulating characteristics It is made from ceramic fiber, clay, inert fillers and a small amount of organic binders to increase handling strength. It contains no asbestos and can be easily substituted for asbestos bearing millboards. It is smooth and flat and can be used in a variety of environments up to 2300ºF (1260ºC). It maintains its integrity through-out a wide temperature range and is easily die cut.

Standard Sizes  · Specifications  · Thermal Conductivity  · Applications  · Advantages

Standard Sizes

Sheet Thickness

1/32 to 1/2 in

Sheet Area

55 x 55 in

Machied Shapes Diameter

1/32 to 55 in

Machied Shapes Thickness

1/32 to 1/2 in


Maximum Use Temperature

2300 ºC

Typical Chemical Analysis

Al2O3 - 30%
Other Oxides - 2%

SiO2 - 60%

Nominal Density

30 to 35 lb/ft³
480 to 560

Tensile Strength

Cross direction 250 lb/in² (17.6 kg/cm²)
Machine direction 750 lb/in² (52.7 kg/cm²)

Compression at 20%

1735 lb/in²


8 %

Dielectric Strength (ave.)

50 V/mil

Thermal Conductivity

Thermal Conductivity at 500ºF (260ºC) Mean Temperature

0.64 BTU-in/hr-ft²-ºF

Thermal Conductivity at 800ºF (427ºC) Mean Temperature

0.78 BTU-in/hr-ft²-ºF

Thermal Conductivity at 1300ºF (704ºC) Mean Temperature

1.03 BTU-in/hr-ft²-ºF

Thermal Conductivity at 1600ºF (871ºC) Mean Temperature

1.31 BTU-in/hr-ft²-ºF

ULTRA TEMP 1401 MILLBOARD possesses excellent resistance to chemical attack.
Exceptions include hydrofluoric acid, phosphoric acid, and strong alkalies.

ULTRA TEMP 1401 MILLBOARD is unaffected by oil or water. Thermal and physical properties are restored after drying should the board become wetted.

ULTRA TEMP 1401 MILLBOARD can also be provided wetted.

ULTRA TEMP 1401 MILLBOARD can also be provided with silicate surfaces to provide added surface strength.
  • High and low temperature low pressure gaskets
  • Personnel protection
  • Hot repair
  • Duct insulation
  • Parting media
  • Backup insulation
  • Heat and flame shields
  • Wood stove thermal barrier
  • Low and high temperature dryers
  • Expansion joint material

  • Easy to die cut
  • Low thermal conductivity
  • Good compression resistance
  • Low heat storage
  • Good dielectric strength
  • Thermal shock resistance
  • Temperature stability
  • Excellent dimensional stability


Data Sheet for 1401 Millboard (2300°F Millboard and Gasketing Material)
(PDF, 181KB)

twitterfacebookFlickrLinked InSite created by ThomasNet Web Solutions and powered by Navigator Platform
Foundry Service & Supplies, Inc. | Heat And Corrosion Resistant Industrial Insulation & Construction Materials