... . Waterproof and heat insulation 4. Fast and convenient install Rock Wool Sandwich Panel Specification:External steel panelThickness: 0.4mm ~ ... client’s requirement due to continuous forming production.Shape: Notch + Alum. Joint + Notch (Tongue & Groove type is also available) ... . And insulation materials usually use EPS, XPS, PU, Rock wool, Paper honeycomb, Aluminum honeycomb etc.They are widely ...