Wall surfaces to be painted must be clean, dry and free from loose and flaking materials. Remove fungus and all loose and powdery residues with a wire brush under running water or a high presure water jet. Areas affected by fungus and algae growth should be treated with Sissons Anti-Mould Solution. Seal with one (1) coat of Sissons Alkali Resisting D Primer where high alkalinity is present. Do not paint on walls where moisture is high or during wet weather.