... . Waterproof and heat insulation 4. Fast and convenient in Paper honeycomb sandwich panel Specification:1. External steel panelThickness: 0.4mm ... /PUDF, Stainless steel with brushed/mirrored. 2. Insulation materialType: Paper honeycomb, Aperture: 20-35mm 3. Panel Width (mm): 980, ... usually use EPS, XPS, PU, Rock wool, Paper honeycomb, Aluminum honeycomb etc. They are widely used in clean room as ...