Answer
Jun 14, 2026 - 06:25 AM
Yes, you can epoxy over OSB (Oriented Strand Board), but proper preparation is crucial. The OSB surface should be clean, dry, and lightly sanded to ensure good adhesion. Applying a suitable primer before the epoxy can help prevent absorption and improve the finish. Also you must be sure that the OSB floor is structurally sound with minimal deflection. Improperly supported OSB floors will deflect greater than the flexibility of many epoxy coatings. In these cases, you must use an epoxy specifically designed to flex on floors with high deflection.
