Surfaces must be clean, dry, and free from grease, oil, dust, and contaminants. After the cleaning process, a physical or chemical pretreatment might be required, depending on surface and type of material. The type of pretreatment must be determined by tests.
New concrete floors should be at least 28 days old, with a moisture content of less than 4%. If earlier application is required, the substrate should be tested for moisture conditions.