TruExterior Siding & Trim is a true innovation, invented to address issues common with other exterior products in the industry. It's a siding material that offers a high level of dimensional stability to help reduce expansion and contraction. Plus, TruExterior resists water, making it ideal for applications with ground of masonry contact. TruExterior gives builders the freedom to build beautiful homes with confidence. TruExterior products are made with fly-ash, a by-product recovered from coal combustion. when fly-ash is combined with polymers, it becomes a durable material that's ideally suited for exterior siding and trim. Rigorously tested in various extreme climates, TruExterior products are resistant to moisture and bugs once installed, pre-primed and ready to paint any color.. 70% Recycled Materials Used - Recycled content verified by SCS Global.