Commercial strength. Deep cleans carpets. Lifts tough spots and stains. Zep Commercial Premium Carpet Shampoo is designed specifically for use with steam and extractor machines on stain resistant carpets to deep clean spots and stains while removing allergens caused by pet dander and dust mites. For use on: Carpet and stain resistant carpets with steam or extractor machines. Not for use on: Wool, other natural fibers or S rated upholstery. No phosphates. Allergen testing performed by a leading allergy and asthma medical and research hospital.