Recently we have sprayed a water tank waterproof and anti-corrosive project,the construction steps are as followed:
1.Prepare the substrate.
Mechanical methods such as sand blasting, shot blasting, grinding, sweep blast or high pressure water blasting are preferred. The surface of concrete should be dry, smooth, and structurally sound. It should also be free of depression, scale, or foreign deposits of any kind. Remove all curing compounds, laitance and expose all voids. Use a good epoxy filler/mortar for bug hole filling, skim coat or repairs. All concrete should be tested for moisture.