Our high-tech ceramic backing is very smooth finish, very good in water-proof property, and makes one side welding both sides beads shaped in fine quality. The improvement of working efficiency and cost saving are gotten by omitting the backside gouging and root passes. The ceramic backing is very good suitable for Gas metal arc welding (GMAW) and Sub-merged arc welding (SAW) of V-shape, X-shape, T-shape joints of metal structures in shipyard, off-shore building, heavy industries etc.