Flex Trim resin molding’s traditional crown molding shapes will bend to an exact fit, according to the manufacturer, making it easy to install on true radius wall curvatures with a radius of 96 inches or greater. The moldings are not affected by salt, moisture, heat, or cold, the maker says. They are available in both paint-grade and stain-grade styles. 800-353-9874. www.flextrim.com.