De-Icing Salt
Salt is a very strong ingredient when dealing with melting snow and ice.

When salt and snow interact, a reaction is caused in which allows the roads and pavements to be cleared quick and easy.
Salt is spread on the snow/ice-covered roads. When the salt and snow interacts, it slowly begins to melt into a salty water. Then It freezes at very low temperatures so it remains a liquid for quite a while.