Wet & Forget 5 litre is the perfect outdoor cleaning solution. It removes contaminants such as mould, lichen, and algae without using harsh methods. It is suitable for cleaning a variety of surfaces such as artificial grass, patios, driveways, tarmac and more. Wet & Forget 5L is designed with you in mind – simply apply to the surface and forget about it – let Wet & Forget do the hard work for you! It has an unlimited shelf life and it is completely free from aggressive chemicals such as bleach or ammonia that can potentially damage surfaces.