Paint With Confidence

Exterior Common Issues & Solutions

Poor Galvanized Metal Adhesion

Text & image courtesy of the Rohm & Haas Paint Quality Institute

Poor Galvanized Metal Adhesion

Paint that has lost its adhesion to a galvanized metal substrate.

Possible Cause

  • Improper surface preparation, such as inadequate removal of rust or oils.
  • Failure to apply a primer before application of an oil-based or vinyl latex paint.
  • Failure to sand baked-on enamel finishes or glossy surfaces before painting.

Solution

Any rust on the metal should be removed with a wire brush; then, an acrylic latex corrosion-resistant primer should be applied (one coat is usually sufficient). Prime bare galvanized with a corrosive-inhibitive latex primer, and apply a top quality latex paint.