I came across the following question here: Is there a safe way to de-ice an unsealed driveway? The accepted answer mentions rock salt being fine for such a driveway (asphalt), and the other answer mentions sand as an one alternative.
Whereas: What to do for a a patterned concrete walkway (or driveway)? We've heard from a number of sources that regular de-icing salt / rock salt is not safe and will probably cause the concrete to deteriorate over time.
So, ruling out traditional de-icing salt and sand too (we don't find it very effective), what other products are there to de-ice a concrete walkway?
If possible, please describe the chemicals being used in the products mentioned and not just the brand name. I'm also interested in favoring environmentally-friendly products. Still, the most important thing is to do the job of melting the ice so the walkway is safe for walking on.
Best Answer
You are right, Salt will eventually harm or "shell" concrete. I would suggest potassium chloride. This product will de-ice down to apx 15 F and will not harm the concrete or adjoining lawns or other plantings. Potassium chloride comes in a variety of brand names and can be found at most hardware stores. We use it all the time for roof de-icing because it will not harm roofing,siding and vegetation.