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Item # Ultratemp-I, Ultratemp-I (600ºF Fiber Reinforced Cement Board)

Ultra Temp I is a noncombustible, asbestos-tree, high density board. It is engineered to handle higher temperatures, loads, and electrical conditions with less shrinkage and degradation compared to previous non-asbestos formulas.

Ultra Temp I can accommodate 600ºF after initial heat conditioning. Ultra Temp I may be used in a wide variety of applications where a combination of high strength thermal stability, electrical insulation or machinability is required.

Specifications  · Note



100 lb/ft³

Compressive Strength

10400 psi

Maximum Operating Temperature (After Initial Heat Conditioning)

600 ºF

Modulus of Rupture

2600 psi

Modulus of Rupture/ (Density)2


Brinell Hardness

17, (500 KG load 6 mm dia.)

Normal Moisture Content

<12 %

Water Absorption

21 %

Thermal Conductivity at 250ºF

2.40 BTU-in/hr-ft²-ºF

Volume Resistivity

7.1 ohm-cm x 1010

Surface Resistivity

7.0 ohm-cm x 1010

Arc Resistance

260 sec

Dielectric Strength

35 V/mil


3/8 to 3 in


48 in


96 in

Fire Hazard

Flame spread - 0
Smoke developed - 0

Contact your supplier it you have any questions on initial heat conditioning.

The physical and chemical properties of Ultra Temp I represents typical average values obtained in accordance with accepted test methods and are subject to normal manufacturing variations. They are supplied as a technical service and are subject to change without notice. Check with your supplier to assure current information.


·  Cement Boards


Data Sheet for Ultratemp-I (600ºF Fiber Reinforced Cement Board)
(PDF, 58KB)

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