Density
0.4 to 5.0 t/m3
Impermeability
Non
Softening coefficient
Kram ≥ 0.8
Thermal conductivity
0.1 to 2.0 W/m˚C
Thermal expansion coefficient
7 × 10−6 ˚C−1 to 15 × 10−6 ˚C−1