The effective life of a carnuba wax depends on a number of things. The number of washes and the type of cleaners used for washing, weather conditions, atmospheric pollution, you get the idea. That's one of the reasons to use carnuba as a top coat over some type of sealer. A good sealer will last much longer than the wax itself. The shine of the sealer will also be enhanced by the carnuba. Both Pinnacle and S100 market detailers that contain carnuba wax that can extend the life of the original coat. Quality carnuba should last 6-8 weeks with regular washings, but each brand is different. Wolfgang, another product sold by Auto Geek, is another top end product. Lots of information on the website. JoeS