Rug Doctor Carpet Detergent (4L) keeps carpets clean and fresh. Its anti-stain formula offers lasting protection against spills and stains, extending the life of your carpets. A single 4L bottle is enough to clean approximately 1600 sq ft/150m². For use with all hot water carpet washers to give a deep down clean. Ensure that your carpets are stain-free with Rug Doctor Carpet Detergent 4L. The anti-stain formula keeps your carpets looking clean and fresh for longer. It protects your carpets from accidental spills and stains long after cleaning has finished.