For stainless steel exhaust pipes. Fast acting, safe agent to remove blue, gold and brown discoloration in stainless steel exhaust systems. Perfect combination of active chemical ingredients and selected polishing alumina. Corrosion inhibitors eliminate the risk of damage to unstained surface areas. In moderation and easy to apply to affected areas. No overspray or masking inconvenience required. Also suitable for welding seams. Does not contain VOC.