Sea Foam Motor Treatment is a petroleum based product that helps clean internal fuel and oil system components. Sea Foam is an EPA-registered product, and will not harm engine components, seals, gaskets, catalytic converters or oxygen sensors. Sea Foam helps liquefy gum and varnish deposits helping to free sticky valve lifters and rings. By using Sea Foam to help eliminate varnish and carbon buildup, mechanics can more accurately diagnose mechanical problems that may exist.