No 2 Mould is a highly effective spray treatment to destroy mould, fungus, algae which has formed in damp areas inside or outside. No 2 Mould is specially designed to be a fast and highly effective on various types of surfaces such as shower areas, tiled surfaces, grouting, swimming pools, saunas and is safe to use on marble surfaces. No 2 Mould 500ml Spray will treat approximately 2-3m2 of tiled wall surfaces. Application - No 2 Mould has a bleaching action. If in doubt, first test on an inconspicuous area or a discreet place. Do not remove fungi and algae before using the product. Spray the surface from 3 - 5 cm distance and leave it to work for 30 minutes. In case of stubborn stains, spray again and leave to work for another 30 minutes. Clean the sprayed surface with sponge and water. Elastic grouting (for instance silicone paste) must be washed off after 30 minutes and be treated again.