... cement board 2) Non-pollution: 100% non-asbestos, 3)waterproof, soundproof, insect-proof DescriptionCalcium Silicate Board /fiber cement boardNon-asbestos Calcium Silicate Board----Raw materials are Portland cement ... ; CNAS waterproof, soundproof, insect-proofNon-pollution: 100% non-asbestos, no VOC gas, and no radiation.Fireproof: Incombustibility ... Class- A (A1) 2013* high strength fiber cement board