1.100% waterproof 2.zero formaldehyde in core materials 3.sound-insulation (with mute cavity) 4.fireproof 5.heatproof 100% 100% waterproof wooden floor Base materials are made of natural fiber( corn stalk, straw, etc), quality wood powder, calcium carbonate, PVC grains etc., through polymerization and extrusion. During the production process, no bonding adhesives are added, and therefore the base ...