My winter washer fluid is rated to minus 45 degrees Celsius. So

You can buy winter washing fluid that says it’s good for up to minus 49 degrees Celsius, and that doesn’t mean it won’t freeze on a cold windshield when it’s minus 15 degrees Celsius

Rain-X -20F 2-In-1 All-Season Washer Fluid

Rain-x 113645 De-icer & Bug Remover Windshield Washer Fluid, 1 Gallon (Pack of 6) : Automotive

Is it safe to drive when it's really cold? - Quora

McKee's 37 MK37-540 Anti-Frost Windshield Washer Fluid, 32 oz. : Automotive

Brutally cold weather reaching deep into lower United States, Nation/World

PEAK (PWN0H3) -20°F DE-ICER Windshield Washer Fluid - 1 Gallon : Automotive

6 Pack Peak PWN0G3 Windshield Washer Fluid With De-Icer Effective To -20 Degrees Fahrenheit 1 Gallon Jug : Automotive

My boss stated we should mix this, with our 55 gal washer fluid to winterize it uh should I?.. : r/Justrolledintotheshop

My winter washer fluid is rated to minus 45 degrees Celsius. So why is it freezing on my windshield? - The Globe and Mail

Weld-On #45-43 ml cartridge - Chemical Concepts