... suitable for any purposes of applications. DescriptionWood Grain Fiber Cement siding BoardRaw Materialsfiber, cement, quartz sand, ... absorption,%≤2518.2Qualified4waterproofnessAfter 24h of inspection, there's trace of wetness and no water drop on ... class)Average temperature rise,°C≤5018.2QualifiedFire duration ,S≤200QualifiedWeight loss,%≤5010.3Qualified9Radiation limitInternal radiation index,IRa ...