MDO Plywood

MDO (Medium Density Overlay) plywood is a panel product with a resin-impregnated fibre overlay bonded to the face under heat and pressure, available at Windsor Plywood. The overlay creates a smooth, consistent paintable surface that eliminates wood grain telegraphing. MDO is the standard panel for exterior signage, concrete forming, painted exterior soffits, and painted architectural panels.

Features

• Resin-impregnated overlay creates a smooth, grain-free paintable surface
• Waterproof phenolic resin adhesive for exterior performance
• Surface accepts paint without grain telegraphing
• Available in one-sided and two-sided overlay configurations
• More durable than standard plywood in exterior paint applications
• Standard panel for exterior signage and painted architectural panels

Specifications

Common Uses

MDO plywood is used for exterior painted signage where a smooth, stable painted surface is required over many years of exterior exposure. It is also used for concrete forming panels, exterior soffits and fascia, painted exterior wall panels, and any application where a smooth, exterior-durable painted surface is needed without grain telegraphing.

Pro Tips

• Apply an exterior-grade primer specifically formulated for wood before painting MDO -- this seals the overlay and improves paint adhesion.
• Seal all cut edges with a paint-on wood hardener or edge sealer before installation -- the plywood core at cut edges is vulnerable to moisture penetration.
• For concrete forming, apply a concrete form release agent before each pour -- MDO can be reused multiple times as a form panel when properly maintained.

Frequently Asked Questions

What is the difference between MDO and regular plywood for paint?
Regular plywood has a wood veneer face that telegraphs grain through paint. The MDO overlay creates a uniform, grain-free surface that accepts paint evenly and produces a smoother, more professional painted appearance.

Can MDO be used for interior applications?
Yes. MDO's smooth, stable surface is excellent for interior painted wall panels, built-in furniture, and any interior application where a smooth painted surface without wood grain is desired.