121X3 2-1/2" Flatstock S4S E2E Primed MDF is a smooth, knot-free MDF flatstock, factory-primed and ready for topcoat. Flatstock is a smooth, square-edged board used as a building block for custom trim assemblies, window and door surrounds, mantels, built-in shelving, and any application where a plain, straight-edged profile is needed. Available at Windsor Plywood locations across Canada.
Features
- Factory-primed MDF -- smooth, knot-free surface paints to a flawless finish without site priming
- Consistent density throughout -- no grain telegraphing, no knots, no resin bleed under paint
- Eased 2 Edges (E2E) profile at 121 -- Interior -- band moulding, panel frames, wainscot cap rails, built-up assemblies
- Available at Windsor Plywood locations across Canada -- confirm stock at your local branch
Specifications
| Material |
MDF |
| Profile |
Eased 2 Edges (E2E) |
| Width |
2-1/2" |
| Finish / Coating |
Factory white primer |
| Application |
Interior -- band moulding, panel frames, wainscot cap rails, built-up assemblies |
| Availability |
In-store -- confirm current stock with your local Windsor Plywood location. Some products may be special order. |
Common Uses
Cut to size and install with finish nails or construction adhesive. Flatstock is the base component for custom trim builds -- combine multiple widths and profiles to create elaborate door surrounds and mantels. MDF is a paint-only material. It does not accept stain and must be kept dry -- do not install in bathrooms or high-humidity areas.
Pro Tips
- Flatstock is the DIY trim builder's best friend. Combine a wide flatstock header with casing legs to create a Craftsman-style door surround without buying specialty moulding.
- Apply two coats of quality interior latex paint in satin or semi-gloss directly over the factory primer. Seal all cut edges with primer before painting -- exposed MDF edges absorb paint unevenly.
- For custom mantel and built-in applications, rip flatstock to the exact width needed on a table saw. The square edges allow precise custom sizing.
Frequently Asked Questions
What is flatstock used for?
Flatstock is a square-edged board used to build custom trim assemblies, window headers, mantels, and built-in shelving. It is the base material for any trim design that starts with a straight, flat profile.
Can I use MDF moulding in a bathroom?
No. MDF absorbs moisture and swells irreversibly. Use solid wood (hemlock or cedar) moulding in bathrooms and high-humidity areas.
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