U.S. Intec®, a division of BMCA, is the oldest manufacturer of APP (atactic polypropylene) modified bitumen roofing products in the United States. Today we remain one of the largest domestic manufacturers of APP and SBS (styrene-butadiene-styrene) modified bitumen roofing membranes, as well as built-up roofing membranes. With millions of square feet of material installed, our modified, built-up and composite systems are counted on by tens of thousands of property owners to protect buildings across North America, and around the world.