The best thing for removing ice and snow is a calcium chloride-based “ice-melt” or rock salt. If you’re unsure about what type of ice-melt you’re looking for, search for a product that has the phrases, “safe for concrete”, “safe for flagstone”, and “will not kill grass” in its description. Do not use ice melt with an added colorant. The dyes can stain your composite decking. Never use sand on Fiberon Decking. Sand abrasion can grind into the decking and permanently damage the surface.