Description:

Black, grey or brown areas of fungus growth on surface of coating. Can also include Red, Yellow and Green Algae.

Possible Diagnosis:

• Damp areas receiving little or no sunlight are susceptible to mould.
• Painting over an area that has had mould.
• Low quality paint containing no or low levels of in can biocides.
• Reusing opened containers that have received contamination from application transfer and or storage conditions.

Remedy:

• Determine firstly if the contamination is dirt or mildew by applying a few drops of household bleach. If the discolored areas dissapear. It's most likely mould.
• Remove source of moisture by fixing the leak source, sealing or ventilation.
• Apply biocide / sterilizer and or mildewcide as per manufacturer's instructions. Then scrub and rinse thoroughly.
• Repeat with paint that is protected with dry film biocide

Recommended Products:

• Top Paint Fungal Wash
• Top Paints Sheen
• Top Paints Sandcoat