Peeling from wood

 

Peeling from wood

Causes
  1. Inadequate sanding.
  2. No primer on shellac.
  3. Application in the sun, causing solvents to evaporate too quickly.
  4. Paint film altered by an additive: drying agent, oil…
  5. Wrong product selection.
  6. Excessive wood humidity: close to vegetation, humid soil, etc.
  7. Temperature and humidity variations.
  8. Water infiltration under the paint film.
  9. Contaminants: patina, mildew, soot, etc.
  10. Lower flexibility of paint film.
  11. Accumulation of paint layers.
Solutions

1. Also for causes 2-11:
Correct humidity problems if required. Clean, strip and sand surface, then apply
coating.
  • To prevent water infiltration, verify the sealant quality.
  • Avoid painting directly under the sun.
  • Check surface temperature. It must match room temperature. Optimal application
  • temperature is between 15 °C and 25 °C (60 °F / 77 °F). Outdoors, avoid painting if the wood moisture content exceeds 12 % (latex stains 18%).
  • Paint the 6 faces of the wood and saturate the wooden boards’ extremities with coating. This keeps the wood from absorbing excessive humidity, which hinders coating adhesion.
  • Use the wood renovator to eliminate patina.
  • Use household bleach to eliminate mildew.
  • Use a solvent-based primer on surfaces repaired with shellac.