Apply 2 coats with suitable tools on the prepared substrate to meet the flatness requirement. The first coat should be thicker and stiffer, with a thickness of approx. 0.5 mm–2 mm; the second coat should be thinner and more fluid. After the putty has dried and hardened, sand with sandpaper and remove dust. Make the surface smooth and flat. Application temperature: 5°C–40°C.