CRC Clean-R-Carb is a product engineered to maximise carburettor performance and control pollution. It is an effective in place cleaner that removes deposits, gum, varnish, lacquer, resin, paraffin, metallic salts, oil oxides, tar and gasoline stains. Will not harm catalytic converters or oxygen sensors.ApplicationsRecommended for use on all fuel system components as a general parts cleaner