TruMelt 12% is a premium blend of 88% oven dried, screened sodium chloride and 12% calcium chloride flakes. Snow fighting professionals that are looking for full disclosure of ingredients, need look no further. TruMelt is true to its name. We disclose the truth about ingredients and true effectiveness. TruMelt 12% is the premier choice for commercial and residential applications. Due to the inclusion of 12% calcium flakes, it melts effectively down to a low temperature of -20F.