Dark Mildew Spot
Definition:
Mildew can cause dark spots to spread to certain areas on the paint coating. Moss can also grow in the same area and usually this occurs in the lower parts of a wall.
Causes:
• No base paint was used on the surface that was painted.
• There was already mildew on the surface before paint was applied.
• The immediate surrounding area has high levels of humidity.
Solutions:
• Find out the cause of mildew by giving a few drops of bleach on the surface. If the dark spots disappear in a few minutes, then the cause is fungi on the surface. If the dark spots are still on the surface, usually it is either dirt or dust.
• Find and repair any sources that may cause the wall to be damp, such as water leaks or leaking water pipes.
• Cover all plants and bushes with a cloth cover before cleaning the surface.
• Completely scrape and clean all layers of mildew and moss. Use a putty knife, a wire brush, a rough scrub, and sandpaper. Paints affected by mildew or moss should be scraped all the way until the skim coat layer because mildew roots and moss can penetrate through the skim coat.
• Clean the surface using an anti mildew solution or using a chlorine and water solution (with a 15 : 85 ratio).
• Make sure to use gloves, eye protection, and protective clothes for your protection.
• After applying anti mildew solution, let it for two hours.
• Completely rinse the surface with clean water and let the surface completely dry.
• Use Mowilex Undercoat Tembok base paint and Mowilex Water Proofing Sealer before applying a final coating with Mowilex Interior or Exterior paints.