1. Base material: cement base material needs to be fully polished, remove the surface of the base material oil, dust, floating ash, so that the cement structure layer exposed. The steel substrate needs to be sandblasted to remove dirt and rust. The surface of the steel substrate can be roughened so that there are enough physical riveting points between the primer and the surface of the steel substrate.
2. Primer:polyurea enterprises have a special primer, such epoxy system. Note that the primer should adhere well to both the substrate surface and the polyurea coating. The surface drying time and physical properties of primer have a great influence on the construction of spray polyurea.
3. Polyurea: different spraying polyurea is available according to different uses.