Surfaces must be sound, clean, dry and free from all defective or poorly
adhering material, dirt, grease or wax and be thoroughly rubbed down using
a suitable abrasive paper and dusted off. Treat areas affected by mould,
fungi or algae with Dulux Fungicidal Wash (A980-19260). If after thorough
preparation, surfaces remain powdery, seal with one coat of an appropriate
Primer (see TDS). It should not be applied on areas where moisture
reading (as measured by Protimeter) exceeds 16%. These wall should be
left to dry further.