German Waco White Grease Chain Gear Special Lubricant After-sales Guarantee The German “VOK (VOK) Dry Lubrication Water Wax Series” represented by Duden is a professional dry film lubricant specially designed for the friction coefficient control of fasteners. It can reduce the coefficient of friction and stabilize it to a very small deviation value, and the special formula can form a transparent, non-stick polymer lubricating film with excellent adhesion on the surface of the fastener, which does not cause contamination during assembly and does not affect tolerances, and meets the needs of the automotive industry. As a result, it has become a series of products widely designated and recommended by internationally renowned automakers and automotive fastener manufacturers.