Tork Oil & Grease Liquid Soap S4: To remove dirt, oil and grease, Tork Oil and Grease Liquid Soap is formulated with a fat-dissolving ingredient that's highly effective yet gentle on the skin. No fragrance or colour is added, so it's gentle to the skin. It's suitable for Tork S4 dispensers, which are certified easy to use and provide good hand hygiene to all users.