The HG Mould Spray is designed to tackle mould, damp, or weather stains on various surfaces. This includes the silicon seal between a bathtub and tiled wall, shower cubicles, plaster, and more. It's also suitable for cleaning tile walls, seals in swimming pools, garages, sheds, saunas, and conservatories. The spray is self-acting and produces results within 30 minutes. It comes in a 650ml size.