Heartland Architectural Products, LLC is a manufacturer's representative agency handling commercial roofing and waterproofing products, headed by David Gary and Kevin Decker. Heartland AP represents Firestone Building Products and Firestone Metal Products in Oklahoma. Firestone's product offerings include EPDM, thermoplastic (TPO) and asphalt roofing systems, polyisocyanurate insulation, Firestone metal roofing and related roof accessories.