The inclusion of a glycol based Anti-Freeze in winter helps prevent the engine coolant from freezing up and blowing a hose or radiator core (or worse!). However, It’s not just during the winter that you need protection for your engine and radiator. Using anti freeze during the summer improves the effectiveness of the coolant by helping to remove the heat from the block and dispersing it more efficiently, even in the worst traffic jam! It also protects from corrosion damage.