Astonish Mould and Mildew remover blasts away tough stains and effectively removes mould and mildew stains in minutes. For a long lasting cleaning solution, use regularly to help prevent the return of mould. Ideal for use on walls, uPVC window frames, glass, plastic shower curtains, bathroom tiles, grout, silicone sealant, concrete, sinks and plugholes. Spray, leave for a few minutes then rinse or wipe clean. On vertical surfaces apply via a sponge or cloth to avoid run off.