Will Sea Foam spray effect my car’s catalytic converter?[SOLVED] Asked by Jim W. In Alabama Will using Sea Foam Spray do anything to hurt the catalytic converter on my Lexus LS400 4.0L?
Thanks for the question Jim. No, Sea Foam Spray does not have any effect on a vehicle’s catalytic converter. Sea Foam Spray is used up in the combustion chamber so it’s all vaporized with the hot exhaust as everything is sent toward the tailpipe.