Poured concrete needs time to cure and seal, so do not apply ice melters to first-year concrete. Do not use on porous or improperly cured concrete, precast concrete items, masonry, mortar, wood or other porous materials. Use only on properly placed, cured and sealed, air-entrained concrete. To reduce risk of damage, apply Diamond Crystal ice melters according to package instructions. You may also apply a quality water-repelling sealant to the surface prior to winter. Finally, promptly remove snow, ice and slush that develops on the concrete after any ice melter application.