Ultimate Screenwash is a highly concentrated formula that can be diluted to suit a range of weather conditions, seasons and screen contaminants. The 500ml container makes up to 8 litres of screenwash, and will easily cut through road grime, insect remains and everything else that may end up on your windscreen. During the winter the dilution can be adjusted to suit falling temperatures, whilst maintaining screen cleaning capabilities. If used neat, Ultimate Screenwash remains effective and unfrozen at -45C! Suitable for all wash jet types, as well as headlight wash units, safe on paintwork and trim.