... freezing house, clean room, garage door, roof, wall, anti-fire, sound absorbing etc, with good performance on energy conservation, environmental ... systems (PU cold storage Panel) 1. Fire Rating. PU reaches Grade B2 fire rating.2. Heat & Sound Insulation. Temperature ... insulated material for freezer.3. Good chemical resistance, waterproof, anti-corrosion, insect-free etc.4. Advanced Tech. Automatic ...