While on tour of the Maine marinas, our team fielded a question from a sternman who spilled a large quantity of full strength, undiluted Vivesan Marine Cleaner on his skin. It did not burn him, as had other products he'd used in the past. The lobsterman asked us if there was going to be a problem, and why didn't it burn? We told him that it's no problem because Vivesan is 100% plant-based, and skin contact--even at full strength--has no side effects or impact on human health. His response: "Cool!"