Our mould cleaner eliminates mould from any surface Mould, damp or weather stains often appear on the silicon seal between the bathtub and the tiled wall, in the shower cubicle or on plaster. This anti mould spray is also suitable for cleaning tile walls, seals in the swimming pool, garage, shed, sauna and conservatory. How do you use HG mould spray? Follow the steps below for correct use of HG mould spray. The mould spray has a bleaching effect. If in doubt, test first in an inconspicuous place. Spray the surface from a distance of 3 to 5 cm with HG mould spray. Leave to work for 30 minutes and then clean with water and a sponge. We recommend using rubber/plastic gloves and ventilating well during use. Use biocides safely. Always read the label and product information before use.