• Manifestations
  1. Waxy substance stains come from reconstituted wood products that are used in producing hardboard siding.
  2. It may contain staining substances, which bleed through paint and also through some primers.
  3. This can cause problems such as poor adhesion of paint, dirt pickup and areas of mildew on the surface.
• Causes
  1. Not applying primer on the hardboard siding prior to painting.
  2. Letting hardboard siding become weathered before paint is applied.
• Solutions
  1. Applying a high qualityacrylic latex primer intended for exterior surfaces.
  2. Allow sufficient drying time.
  3. Then apply high quality acrylic latex paint made for exterior use.
  4. Two coats are recommended by the American Hardboard Assoc. to achieve the best results.
  5. If the grade of hardboard siding you are treating has already been primed at the factory, only the high quality paint is required.
  6. Do not use low quality paint as it is highly pigmented and more likely to develop wax bleeding than the high quality paint.