Naval mineral wool fireproof heat-insulating product (PS-2) is a class A non-combustible material with a two-layer structure, hard layer and soft layer. The soft layer is made from several nature ores through melting, centrifuging and curing processes. The hard layer of high strength consists of multiple inorganic mineral fibers and cured by thermal curing. To get final PS-2 products, glass cloth will be coated outside after the hard layer and soft layer being combined, then dry. The soft layer is the inner layer which can fit well with steel plates and prevent condensation of water. It offers good anti corrosion, sound absorption and thermal insulation. The hard layer is a hard and smooth surface with good toughness, impact resistance and compression.