EcoGrit Concentrate is a safe de-icer, even if used in large quantities. It is made up in part of repurposing waste products from the cereal industry. It is a biodegradable, natural de-icer, non-corrosive and harmless to wildlife, pets or humans. EcoGrit Concentrate actually protects metals it comes in contact with rather than rusting them and works down to temperatures of -20 Centigrade.
Also, Ecogrit is a concrete safe deicer, applying a concrete safe ice melt to melt ice and snow safely before it penetrates too deeply underneath the surface. There are other ways to help prevent it from cracking, splintering or breaking under the strain of colder temperatures and wetter conditions.