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Formula 90 is a heavy-duty, highly concentrated, triple-strength carpet cleaning detergent for use with truckmounts or portable extractors. Delivers consistent, powerful cleaning on every job. Certified WoolSafe when diluted at the highest level. Formula 90 is a general purpose, mildly alkaline, emulsifying detergent. It is an in-tank product and is specially formulated for use on heavily soiled carpet. It is best used in the extraction process after the carpet has been pretreated with a traffic lane cleaner. Formula 90 is particularly useful when cleaning olefin carpets commonly used in commercial spaces.