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Hardboard-like panel

Image Number 2 for United States Patent #4514448.

Hardboard-like panel having a core of wood fibres intimately mixed with asphalt forming 10-30% by weight of the core. The core is porous and contains 50% by volume of air cells. A resin-impregnated paper is glued to the core. The panel is preferably coated with a long life thermosetting acrylic finish, and used as an exterior siding. A process for making same is also described.

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