For extremely cold temperatures below minus 60'C you might want to use Screenwash Extra Cold. Fortunately in the UK it is rarely needed. But if you are travelling abroad, or your car is parked in a particularly exposed area try this for extra frost protection. Use a 25% solution for protection down to minus 12'C, a 50% solution for protection down to minus 30'C, or neat for protection down to minus 60'C. Methanol based - for trade and professional use only.