... steel panel, widely used in house, freezing house, clean room, garage door, roof, wall, anti-fire, sound absorbing etc, with good ... B2 fire rating.2. Heat & Sound Insulation. Temperature suitable for PU ranges from -200+150. Low Temperature Brittleness does not ... PU sandwich panel, so it is the ideal insulated material for freezer.3. Good chemical resistance, waterproof, anti-corrosion, insect ...