Commercial Insulated Sectional Garage Door 40mm PU Panel with Sealed Joint Design Product Overview Our commercial insulated sectional garage door combines a polyurethane foam core, durable coated steel or aluminum panels, and a balanced lifting system to provide a practical, thermally efficient solution for commercial garages and building projects. Key Features 1. 40 mm Polyurethane Insulated Panels The door panels feature a polyurethane foam core with a density of 48 ± 2 kg