In cold climate, the coolant should contain 40%-60% of antifreeze.
when the proportion of antifreeze is 40%, the freezing point can reduce to -25 Centigrade.
when the proportion is 60%, the freezing point can reach to -56Centigrade.
We suggest customer to choose 50% antifreeze (glycol) and 50% pure water as coolant and well mix them outside before fill into the radiator.