... 3.Light weight and easy to install 4.Low thermal insulation Water proof boards 100% Non-asbestos calcium silicate board ... content ≤10% Expansion ≤0.2%Water absorption ≤39% Moisture Absorption ≤2.0% Impact resistance ≥2.0KJ/m2 Thermal conductivity(-20°c ... Light weight, highstrengh, fier-proof, water-proof, moisture-proof, sound insulation, heat insulation, thermal insulation,anti-shock,anti-impact,anti ...