Do it Best Blue Ice Melt Pellets are ideal for quickly de-icing driveways, sidewalks, steps, and parking lots. With a blue tint for easy application without staining, this blend of sodium chloride and magnesium chloride works fast, melting ice down to -7 Deg. F (-21 C). Safe for trees, vegetation, pets, and cold-weather concrete when used as directed, it leaves no powdery residue and includes corrosion inhibitors to protect metal surfaces.