UK's No. 1* *Kantar. Total Household Cleaners, Bargain Stores, 52 wks. to 31.12.17 Our Mould & Mildew Blaster removes tough stains without the need for scrubbing, whilst regular use helps prevent return. In other words that's less time cleaning, which sounds good to us. Try it on walls, uPVC window frames, plastic shower curtains, bathroom tiles, grout, silicone sealant, concrete, sinks and plugholes.