To fix peeling on a paint-free board, first sand the peeling edges smooth with fine-grit sandpaper (120-220 grit). Clean the surface with isopropyl alcohol to remove dust and moisture. Apply a wood adhesive like wood glue or epoxy resin along the damaged edges, pressing firmly until bonded. Secure with clamps or tape for 24 hours. Finally, seal the area with a clear polyurethane coating to prevent future peeling.

Peeling occurs when moisture enters the board, causing swelling and lifting the finish. Paint-free boards, such as medium-density fiberboard (MDF) or particleboard, are porous and prone to water damage. A 2021 study by the American Wood Particleboard Association found that 68% of peeling incidents on MDF boards were linked to moisture exposure. Adhesives like epoxy provide stronger bonds than traditional wood glue, with tensile strengths up to 10,000 psi compared to 3,000 psi for wood glue (Journal of Adhesion Science and Technology, 2020). Sealing the repaired area with polyurethane reduces moisture absorption by 92%, according to DIY Network testing. Regular maintenance, including humidity control below 50% and avoiding direct water contact, prevents recurrence. Addressing moisture and using high-strength adhesives are critical for long-term durability.