... . High strength 3. Waterproof 4. Heat insulation 5. Aesthetic appearance Paper Honeycomb Sandwich PanelsSpecification:1. External steel panelThickness: 0 ... /PUDF, Stainless steel with brushed/mirrored. 2. Insulation materialType: Paper honeycomb, Aperture: 20-35mm 3. PanelWidth (mm): 980, ... materials usually use EPS, XPS, PU, Rock wool, Paper honeycomb, Aluminum honeycomb etc.They are widely used in ...