It's a purely synthetic, acid free leather wax (fat) and an ideal treatment for antique leathers. This fat has a strongly waterproofing action and prevents mildew growth. It is a common treatment for older cabriolets after Leather Protector treatments and with antique and shiny furniture leathers such as Chesterfield leather. It is also a very good treatment for handbags, suitcases, saddles, shoes etc.
Another area of use is real pull up leather. This is leather where the surface coloring process has been followed up by a colored wax/fat layer. These leathers show wear marks fairly easily which can be eliminated quickly by the use of Leather Preserver.