Leatherique Rejuvenator Oil 16 oz. Simply massage generously the Leatherique Rejuvenator Oil into the leather with your hands, brush, sponge, or spray bottle, and let it be absorbed into the fibers. Contains no oil fillers such as mineral or petroleum oil. A complex blend of proteins and collagen that actually restore the tensile strength to the leather, not just sit on top and make it slick and greasy. Does not harm carpeting or headliners and will also soften rubber door trim and vinyl.