Most of these primers are immediately ready to apply. Some must be diluted, the method and proportion will tell you the instructions. First you need to remove mold from the surface, this can be done with a spatula, and then let the surface dry. The primer is applied to the prepared surface with a spray -spray or ordinary brush. The evenly applied antiseptic primer is left for 6 hours, after which the remains are removed from the surface. At the next stage, rinse the surface with water, let the surface dry and re -apply an antiseptic.