No, Fresh Guard™ Soak is a completely new product that has been specially formulated for cleaning retainers, mouth guards, clear braces and other removable braces. Unlike denture cleaners, including Efferdent® Power Clean Crystals® which use active oxygen to clean through bleaching action, the patented technology in Fresh Guard™ Soak uses active chlorine, leveraging similar technology as is used to purify drinking water, to effectively clean these removable dental devices without causing damage. Unlike most denture cleaners, Fresh Guard™ Soak is persulfate free.