Rock salt is a natural element also called sodium chloride or NaCl if you are a chemistry nerd. It works by lowering the temperature at which water freezes. This phenomenon spurs melting and inhibits freezing. When salt combines with ice and it melts, a brine forms.

Our recommended rates of application are;

Frost 10 to 15gm2
Ice 20 to 30gm2
Snow 30 to 40gm2

Rock salt 20kg