Decosol ad25ff screenwash de icer 500ml decosol ad25ff p decosol ad25ff keeps your vehicle windscreen in tip top spotless condition regardless of the temperature it also has a non smearing additive to keep the screen squeaky clean and free from road grime and bugs p p when used neat decosol ad25ff is effective down to temperatures of minus 35 deg c but for normal driving conditions it can be diluted with water up to 50 times making anything up to 25 litres per 500ml bottle p decoso