We recommend it primarily for the transitional periods of spring and fall, but it can also be used on milder winter days and in summer. Its special formula combines the beneficial properties of summer and winter windshield washer fluids, easily removing insects, mud, and other dirt from the windshield while also protecting the windshield washer system from freezing at temperatures as low as -10°C. The product does not cause light refraction and does not damage rubber and plastic parts, the original paintwork or professionally applied refinishes.