Sandwich products are made from two layers of formed metal panels (or other material panels) and foaming directly in the middle of the panel, insulated inner core forming polymer curing composition. Closed systems also filled bubble molecular structure can prevent moisture condensation. Forming the outer layer of steel full account of the structure and strength] requirements, forming the inner surface layer of flat to accommodate a variety of needs. Sandwich appearance, bright color, the overall effect, it sets bearing. Heat fire, water in one, and without re-decoration, lt is widely used, especially for temporary offices on construction sites, warehouses, fences and so on, in quick installation into use, can be mounted removable reusable materials indices, has a distinct advantage compared to a significant reduction in the cost of temporary facilities, construction sites, is an indispensable new lightweight construction materials.