ZUD cleanser is available online through Amazon.com, Wal-Mart and True Value as of 2015. All sites offer both powdered and liquid forms of the product. Amazon.com and Wal-Mart also have user reviews and ratings for ZUD.
Amazon.com and Wal-Mart advertise both individual and multiple packages of ZUD. Positive reviews of the product state that it does not have an unpleasant smell and that it cleans metal and glass articles especially well. Negative comments mention that ZUD is expensive and does not remove rust stains well. True Value's website sells single containers of ZUD; they are part of the company's free ship-to-store program.