Sea Foam is safe for o rings and seals [SOLVED] Asked by Gary K. In Florida Will Sea Foam Motor Treatment harm o rings and seals when added to a Chrysler 2.7L oil crankcase with 100k miles on it?
Good question, Gary. No, Sea Foam Motor Treatment will not harm seals or o-rings. It’s made with 100% safe petroleum ingredients, so it can’t harm anything.