... two layers of aluminum skin on the top and bottom, and one layer of anti-toxic polyethylene material in the ... .Features;1. Good Formability 2. Weather and vibration resistant.3. Resistance to chemicals and corrosion; Low absorption of water4. Fireproof( ... station, department store, hotel, entertainment, high-class residence, villa and office building, etc.2) Large-scaled advertising board, showcase, ...