Salt will turn back into a solid where there is any air in the system. This will block the radiator or any other part of the system that contains air. The Heating system is the most likely to become clogged by salt deposited due to being the highest point of the system and most likely to contain air. The radiator system and thermostat are at risk if the salt is too concentrated these are narrow areas of flow which can trap salt as it solidifies. Apart from that it will rust the system and the radiator will crumble in a short time.
Antifreeze/Coolant
Water and antifreeze mixture. The antifreeze has additives that help prevent corrosion.
Antifreeze is a substance such as glycol which is used to lower the freezing point of water, and is used as an additive in the radiators of motorcars.
Steel :)
Stop your cat from licking radiators IMMEDIATELY!!! Antifreeze used in radiators is not just poisonous, but deadly to cats even in small amounts. Unfortunately antifreeze also taste great to them. Please stop your cat immediately and consult a vet.
Eethylene Glycol
So that the water used as coolant in most car radiators does not freeze overnight. If it does then, because ice expands as it freezes and melts, it can crack the engine block. The antifreeze lowers the freezing point of the coolant and reduces the risk. The more antifreeze, the less risk of freezing. But too much and it will boil when the car is running. Additives in antifreeze also reduces corrosion and raises the boiling point.
Most commonly it is a mixture of ethylene glycol. Each manufacturer uses their own dyes and anti-rust additives to the recipe.
Any substance that lowers the freezing point of water such as ethylene glycol or propylene glycol which are commonly added to water
Silver is a valuable metal, and is thus not used in radiators.
Distilled water IS good for radiators. In fact, manufacturers recommend using nothing but distilled water to mix with antifreeze. Tap water contains minerals, which can promote corrosion. So tap water should be used in a cooling system only in case of an emergency.
High density liquid calcium chloride from Ward Chemical.