Armorite™ Exterior MDF: Engineered for the Elements! Armorite™ sets a new standard for exterior-grade MDF, combining advanced engineering, sustainability, and performance. Manufactured with a formaldehyde-free resin, Armorite™ resists water (MR50 rated) and incorporates zinc borate to prevent rot, decay, and termite damage, making it ideal for outdoor living spaces, signage, trim, cabinetry, and high-humidity interiors such as bathrooms and mudrooms. Made from 100% Western softwoods, its fine fiber structure ensures faster project turnaround, exceptional machinability, smoother paint coverage, and easier fastening with minimal sanding or priming required. Backed by a 10-year exterior warranty, Armorite™ delivers superior durability and design flexibility, meeting rigorous industry standards including EPA TSCA Title VI, ANSI A208.2, FSC® certification, and ICC-ES ESR-4012 for exterior use. From raised panel shutters and garage doors to non-structural millwork, Armorite™ is the trusted MDF solution for builders and fabricators seeking precision, performance, and long-term reliability in demanding environments.