When 400 Wax D is added to a final rinse, this long-lasting, liquid wax creates a durable finish that keeps dirt from adhering to a vehicles surface while creating a durable finish. 400 Wax D provides added protection against salt, air pollution and acid rain. With a dilution ration of 2000 to 1, 400 Wax D is a highly economical, high-performing wax.