Carpet cleaner removes dirt and stains from carpet, rugs and upholstery. It will not damage carpet fibers, degrade carpet backings or leave residue behind. It is certified by the Carpet and Rug Institute as being safe for use on carpets in pre-spray and extraction cleaning. Concentrated formula dilutes at 1:21 for great value. It meets the Green Seal GS-37 Standard, including reduced health, safety and environmental impact of formulations as well as product efficacy requirements. It also complies with LEED green building requirements and environmentally preferable product purchasing programs in place throughout federal, state and municipal governments.