The Metal Construction Association (MCA) published a white paper about metal composite material (MCM), “Labeling: Who Cares and Why.” To download it, visit

Karl Hielscher, executive director at MCA, said, “MCM is used in many applications requiring different performance capabilities. Clear, consistent labeling is important to help assure the right materials are chosen and used to meet design requirements.”

MCM is formed by joining two thin skins of metal, typically aluminum, but sometimes zinc, copper, stainless steel or titanium, to a polyethylene or fire-retardant core, bonded under a precise temperature, pressure and tension.

“It’s important to know if the product you are using has been tested and meets code requirements for the safety and durability of the construction,” Hielscher said.