PU sandwich panel is the top grade new building material with thermal insulation, load-bearing, fireproof, low thermal conductivity, easy installation, rich colors, beautiful appearance and etc.
A sandwich panel is one structure made of three layers of material: low density core inserted material in between two relatively thin steel skin layers.
The up & down surface of this rockwool panel is Galvanized & Pre-painted steel sheets, core material is 5 components rockwool glue, it is formed by heating, foaming & laminating.