Composite Panels Information | Engineering360 - GlobalSpecSouthern pine panels are used in exterior siding applications. Birch and mahogany are used to produce an extremely lightweight but durable product called aircraft plywood. Plywood structural panels that are designed for interior building and construction applications are made with quick-drying but relatively inexpensive urea-formaldehyde glue. By contrast, wooden panels and panel materials that are designed for the outdoors use more expensive but more durable water-resistant ...