Sandstrom 9A-XF Dry Film Lubricant from SkyGeek is dark gray in color for maximum visibility. The lubricant goes on easily and dries to form a thin layer on the surface of the component you are trying to protect. Because the dry film lubricant requires the addition of heat to cure, the lubricant has a long working life and can be thoroughly spread before curing. Heat cured lubricants are ideal for use in extreme environments or in projects that require delicate placements. The lubricant is sold in a gallon-size can for the best value.