Is Sea Foam safe for a catalytic converter and O2 sensors? [SOLVED]

Thanks for the question, Torrey. We get this question a lot! People also ask if Sea Foam cleans catalytic converters and O2 sensors… Answer: Sea Foam is ALWAYS safe for catalytic converters and O2 (oxygen) sensors. How Sea Foam works in fuel has nothing to do with either, so no effect whatsoever.