This environmentally-friendly ready to use screenwash antifreeze -12°C prevents the screenwash system freezing and is also an excellent cleaner of smeary car windows and leaves a fresh lemon smell behind. MPM Screenwash Ready to Use -12°C is safe for poly-carbonate, windows, rubber and paints and does not leave any streaks behind on the window. In addition the product is not corrosive, harmful or irritating, so it can be used safely.