What Causes Epoxy to Bubble?

Bubbles form from trapped air or moisture escaping through the wet film. Cause varies — concrete outgassing, moisture drive, or application technique.

Key points

  • Substrate outgassing
  • Moisture rising through the slab
  • Overworking the wet film

Frequently asked

Do bubbles always mean failure?

Small isolated bubbles can be repaired. Widespread bubbling signals a root cause that must be fixed first.

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