This knowledge‑graph‑style article demonstrates component relationships and core‑parameter matrix of exterior wall sandwich panel for overseas industrial, warehouse, cold‑storage and prefabricated‑building projects. It compares four mainstream core‑material options and offers scenario‑matching suggestions for contractors and importers. SAMZOON, a Foshan‑based original manufacturer, provides diversified customized exterior wall sandwich panel, free samples and full‑set technical guidance for global clients.