... which is national promotion used green products,waterproof,fire retardant,anti-corrosion,no deformation,light weight,high ... free lamination,especially for anti-moisture,anti-corrosion,anti-fire and environmental.PVC hollow panel have following features: ... deformation even been immersed in water;(3) Fire protection, fire-retardant ---------- B1 level fire-fighting material;(4) Non-toxic, non-polluting ...