Decosol ad25 excel screenwash decosol ad25xls decosol excel screenwash keeps vehicle windscreens squeaky clean and free from road grime and bugs with the added benifit of not freezing at temperatures down to minus 24degc when used neatdepending on your local conditions the screenwash can be diluted with water making anything up to 50 litres from a single 1 litre bottle decosol ad25xls excel screenwash 1 litre