Blitz That Mould Brush-On Mould Remover Gel 250ml 5 "Really good result" Mrs Hearne 07 January 2020 Really good result first application, on areas which had light coverage or small areas of black condensation mould. Deeper more established areas, which had been hard to get to safely with other products, needed a second application. Being able to apply the product directly to the areas via the built-in brush is excellent - the product only goes where you put it. I used this on a shower cubicle which now looks good as new. Remember to air the room during and after using the product.