Medium density overlay panel

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Medium density overlay panel, or MDO panel, is a paintable surface made of plywood.

[edit] Development

Originally developed for sign painting and concrete formwork industries, MDO is also used for other applications as a paintable surface.

It is a plywood product, with a paper face overlaid on the plywood substrate with an exterior grade (usually) phenolic adhesive. MDO is designed to have a smooth paint receptive surface. One or both faces can be faced with paper, and is found in 4' x 8' sheets from 3/8" to over an inch in thickness. MDO is used for short term signs. MDO is not recommended for permanent sign faces because it is susceptible to Warping, Water log, Mold Etc.

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