1. Looking for cracks: For the wet place, sweeping the first knot water until clean up all the grass-roots, when the surface is slightly dry, carefully looking for cracks with crack colored pen or chalk along well marked; For dried place, cleaning up after the pump or blower available blowing dust on the surface. 2. Drilling: By structural thickness of the concrete, from the crack of about 150 ~ 350mm, cross-drilled along both sides of the crack direction. Pitch should be the actual situation may be, after two holes in grout cracks can interchange the principle generally started when the pitch is preferably 300mm; Pore size, supporting the sealing needle size should be, 13mm drill bit using a non-subject. Holes and cracks in cross-section should be 45 degrees to 60 degrees cross and intersect at 1/3 the range of the middle floor. 3. Buried the needle sealing: Sealing the needle as supporting parts, is injected into a slurry of cracks within the connector, fastening application tools when buried, and to ensure the rubber part of the needle and the hole in the wall dried before use, otherwise fastened When prone to slipping. 4. Seepage / reinforcement of the drilling, locking the needle, the agents poured into the cup, turn on the power switch, the cup and tube extrusion residual detergents or lubricants, spray up until the pharmacy, and then insert the needles, The drug injected into the wall of the body, stanch, reinforcement.