How do you seal osb for painting?

To seal OSB (oriented strand board) for painting, start by sanding the surface to smooth out any rough areas and then clean off dust. Apply a primer specifically designed for OSB, as it will help seal the board and provide better adhesion for the paint. Once the primer is dry, you can apply your chosen paint, preferably using a paint suitable for exterior or high-moisture environments if needed. Ensure to follow the manufacturer's instructions for drying times and application techniques.