Marinite M

These oven dried boards are used in a variety of heat insulating processes, fire protection and machined parts. The selection is commonly based on a balance between strength and insulating qualities.


Principal applications : oven walls and linings, welding insulation, fire doors, fire training burn buildings, cable trays, personnel protection, and as insulation for marine ships and off-shore rigs.

Back-up insulation applications : ladles, torpedo cars and tundishes in the iron and steel industry, lime and cement plant rotary kilns, and aluminium die cast holding furnaces.


Technical Data

Density lbs ft³ (kg/m³) 46 (737)
Modulus of Rupture (Flexural Strenght) psi (kg/cm²) 800 (56)
Compressive Strength
Ultimate load psi (kg/cm²) -
@ 5% deformation psi (kg/cm²) 1000 (70)
Moisture Content (normal), % of dry weight 3.0
Thermal Conductivity
Mean Temperatre, Btu-in/ft², hr, °F
250°F -
400°F 0.81
600°F 0.79
800°F 0.81
1000°F 0.86
Mean Temperature, (W/m°K)
121°C -
204°C 0.12
316°C 0.11
427°C 0.12
538°C 0.12
Shrinkage 24 hours at 649°C (1200°F)
Linear (Length or width), % 0.4
Shrinkage 24 hours at 649°C (1200°F)
Thickness, % 1.4
Arc Resistance, seconds, ASTM D 495 -
Volume Resistivity, ohm-cm, ASTM D 257 9.8 X (10^7)
Dielectric Strength, v/mil, ASTM D 495 45
Screw Holding Strength
@7/8" penetration, lbs (kg) 200 (91)
N.B. The information presented may differ from practice. We recommend conducting tests according to the conditions of use. We accept no responsibility for results obtained by the application of this information or the safety and suitability of our products. The data is subject to certain variations without notice.