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Regular problem blistering

Definition

Lifting of the paint film from the underlying surface, which appears as bubbles or blisters in the paint, usually caused by heat, moisture or a combination of both. This condition can eventually lead to peeling of the paint if not corrected.

Causes

  • Painting in direct sunlight or on a surface that is too hot
  • Application of an oil-based or alkyd paint over a damp, wet surface
  • Exposing a fresh paint film to dew, high humidity or rain
  • Moisture passing through interior walls from common household sources such as bathrooms, kitchens and laundry rooms

Solutions

  • Determine if blisters were caused by heat or moisture. Break open and examine the substrate and back side of blistered paint.
  • If only the newest coat of paint is blistered, the blister was probably caused by heat.
  • If the peeled blister contains several coats of paint and the bare surface is exposed, the blister was probably caused by moisture.

For blistering caused by heat:

  • Remove blisters by scraping, sanding or pressure-washing down to underlying coats of paint or primer.
  • Repaint the surface with a high-quality interior/exterior paint (make sure the surface temperature is below 90º F).
  • Find the best paints suited for your project.

For blistering caused by moisture:

  • Repair loose caulking and improve ventilation of the building to prevent a recurring problem.
  • Remove the blisters by scraping or sanding down to the bare surface.
  • Prime all bare areas with a high-quality primer.
  • Repaint the surface with a high-quality paint in the desired finish.

Product Recommendations

Primer

Surface Recommended Primer
Natural Wood EZ-PRIME® Premium
Synthetic Wood ULTRA-GRIP® Premium
Masonry EFF-STOP® Premium
Ferrous Metal BLOC-RUST® Premium, White (Water Based)
Non-Ferrous Metal ULTRA-GRIP® Premium
Non-Ferrous Metal

Exterior

Desired Finish Recommended Product
Flat EVERSHIELD® Exterior Flat Paint
Velvet EVERSHIELD® Exterior Velvet Paint
Eggshell EVERSHIELD® Exterior Eggshell Paint
Low Sheen EVERSHIELD® Exterior Low Sheen Paint
Semi-Gloss EVERSHIELD® Exterior Semi-Gloss Paint
Gloss EVERSHIELD® Exterior Gloss Paint

Please note that these suggestions are provided as a service to you. We are unable to guarantee or be responsible for the results obtained by these procedures. If you have additional questions, ask any of our expert sales associates.