excellent Plane skylight   is for insulating the layer, glass fiber cloth and fire-resistant glues are protect layer outside, in order to prevent the rubber-plastic damaged , glass fiber cloth is spreaded with paint which is to defend the ultraviolet ray and the sea water . This product still have the material soft, easy flection, light quantity, heat preservation effective, low toxicity index etc. Especially for the linear heat preservation in equipments, tube in ships, flat...etc.