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MARCH JLC 1997 00 Contractors are used to working with wood, so when they first hear the term "polymer moldings," they're often skeptical. But my company has been selling and installing polymer moldings for more than 11 years. We've found the material to be easy to work with and reliable. Polymer moldings are manufactured from a highdensity polyurethane foam that is cast in a siliconelined mold. As the castings cure, a smooth outer skin forms. The cured molding receives two coats of factory- applied latex primer. The final product has an impact resistance similar to that of white pine, but is much lighter in weight, with a density ranging from 12 to 20 pounds