Ethanol-based formula you dilute to match the cold you expect
PRISTA winter screen wash is an ethanol-based concentrate in a 1 L bottle, rated for protection down to -60 °C. Top it up in the washer reservoir to keep the jets and lines clear of ice all winter.
Concentrate rated to -60 °C
The -60 °C rating applies to the undiluted product. Mix it with water to suit the temperatures your car is parked in, following the label instructions. That way one 1 L bottle makes more washer fluid than the same volume of ready-mixed product.
Ethanol base from Bulgarian maker PRISTA
The fluid is ethanol-based. PRISTA is the brand of Prista Oil, the Ruse-based producer of lubricants and automotive fluids.