There are a number of effective ways to prevent corrosion under insulation (CUI) on pipes and equipment that operate at above ambient temperatures. Some people think that the best approach is to coat the pipes prior to installing the thermal insulation and not worry about what type of insulation to use. Others believe the best approach is to find the perfect type of insulation—the “silver bullet”—that will never allow CUI. Still others think that if facility owners would simply spend the appropriate money, time, and effort to maintain their insulation systems so as to keep out water, CUI would not be a problem. This article explores these different approaches in more detail.