Acid Fiber Rinse will neutralize all caustic residues and rinse away the detergents trapped deep in the carpet. Acid Fiber Rinse helps guard the carpet against re-soiling and to prevent browning after the carpets have been cleaned. Use this product when zero residue is desired. Acid Fiber Rinse AID is safe for 5th Generation Stain-Resistant Carpets. Formulated with anti-wicking agents.