No surface preparation or application of painting allowed to be performed under the following condition.
Temperature of the material surface is less than 3 °C above the dew point.
The relative humidity is more than 85 % RH (90 % RH for inorganic zinc silicates).
The weather is rainy or foggy, except under shelter, and subject to verification of the atmospheric conditions.
The minimum temperature of the ambient atmosphere and the material surface are within the limits given in the product manual (usually 10 °C for epoxy based paint and 5 °C for acryl-polyurethane topcoat).