This product is for the removal of oil (usually from hair and skin) from leather. Apply Leather Master Leather Degreaser to the leather, and it dissolves the oils and transforms them into a powder that is more absorbent than the leather. This is an aerosol product containing solvents. Use it with proper ventilation only. Please read and follow all safety precautions regarding this product! When a grease or oil stain has built up gradually over several years, it cannot be removed in a few minutes. Your patience is necessary to complete the job. Also, stains left untreated for a long time may have caused additional challenges like loss of color.