This is a unique product, which has been thoroughly tested and proven to give outstanding results on fine leather bindings. Easily applied rich cream penetrates deeply into leather to produce a scuff resistant surface with a rich patina to rejuvenate, restore and preserve. Consists of animal (neatsfoot oil) and other non-drying oils, beeswax, micro wax and it contains no flammable or volatile components. Chemically neutral with defensive buffers to guard against external pollutants. Will not leave an oily or sticky finish on books.