Safe ice melt products for wood and composite decks and building ...Non corrosive wood deck ice control products are available - safe for your fasteners and boards, joists, railings and posts. Does NOT contain Calcium Chloride, a corrosive product to metal. ... DO NOT use salt or calcium chloride on your wood or composite deck which can corrode the fastners and hardware! Salt or any chloride-based products are very corrosive to metal and you can ... Low freezing point of -24° F (-31° C) When used as an anti-icer - prevents adhesion of snow/ice to ...