I use this product to protect the concrete apron on my driveway from salt damage.  In the winter, trucks go down the street and spread salt.  Later the plows come by and push the salt-laden snow and ice onto tree lawns and driveway aprons.  My previous driveway apron that was not sealed became badly damaged.  Since using the Siloxane sealer on my new driveway apron, it remains damaage free.