Simple Green Clean Building Carpet Cleaner removes dirt and stains from carpet, rugs and upholstery. Will not damage carpet fibers, degrade carpet backings or leave residue behind. Certified by the Carpet and Rug Institute as being safe for use on carpets in pre-spray and extraction cleaning. The concentrated formula dilutes at 1:21 for great value. Complies with LEED green building requirements and most environmentally preferable product purchasing programs in place throughout government. Ideal for industrial and institutional use, especially in high traffic areas.