Zep Commercial Premium Carpet Shampoo, in a 1-Gallon pack, is specifically designed for deep cleaning stain-resistant carpets. It works effectively with steam or extractor machines to remove spots, stains, and allergens caused by pet dander and dust mites. The formula contains DuPont stain blockers that prevent re-soiling and reduce allergens. It takes less time to work and is stronger than other carpet shampoos.