After concrete pouring, the angular gomphosis on mesh openings will be embedded automatically to produce high stick force and shear resistance on joints. This mesh is easily cuttable, flexible, formable and movable, which makes it especially suitable for aloft work. The dismantling-free template is able to retain poured concrete, reduce honeycomb between gaps and the risk of sand holes without manually chipping away, roughing, cleaning or curing. Instead, re-pouring can be easily conducted thereon to combine into a firm and integral leakage protection.