Sometimes a little added reinforcement is all that’s needed to turn a well-performing coating into a high-performing composite coating. Such physical composite coatings combine two or more substances that together offer performance properties greater than the sum of their parts. The same is true for chemical composite coatings. This article reviews the various types of composite coatings and described how they enable more robust performance by enhancing properties such as corrosion resistance, durability, flexibility and resistance to cathodic disbondment.