Blushing & Blooming in Paint: Precautions & Repairs

Paint gives us a feeling of newness and sense of completeness in our house. It makes our surroundings more attractive, live and vibrant. However, the deterioration of the paint earlier to its rated life is considered as a failure of the paint. The failures have many reasons and there are various defects.

Several defects like efflorescence, peeling, sagging, etc. are observed in painting, either during painting or sometimes after the painting. These defects arise due to either chemical attacks, effects of atmosphere, sunlight, heat, humidity and dust or individually or jointly deteriorating it. Among them, blushing and blooming are one of the most common defects observed.

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Blushing and Blooming are usually described as the appearance of a whitish substance on a surface of varnish or enamel. Blooming is different from blushing, up to some extent. Blushing is a defect in the paint film. It occurs during the curing process due to condensation of moisture occurring on a coating surface and visible as water spot. Whereas in blooming, top coat of a painted surface dries out and develops haziness. We have already discussed causes of blushing or blooming defect in our recent article.

Precautions to Prevent Blushing and Blooming on Painted Surface:

  • Don’t paint when the paint remains in a state of cure and exposed to cold damp conditions. Follow instruction given by paint manufacturers.
  • Be aware of weather conditions that may occur later in the day or during the early evening.
  • Use correct paint application.
  • Apply the paint under the controlled environment condition.

Tips for Fixing or Repairing Blushing and Blooming:

  • The bloom and blush are easily removed with warm soapy water.
  • Top coat of paint affected by moisture will require sanding and recoating.
  • Remove bloom with clean cloth or suitable solvent cleaners. If necessary, apply undercoat or topcoat following manufacturer’s instructions.
  • If the paint has not cured, apply heat to the surface.
  • If you seen blushing after a first coat, you can add some retarder or a thinner. Using a slower drying paint thinner will allow the water molecules to evaporate before the film locks the water in.

You have therefore to apply paint very carefully after reading the manufacturer’s instructions. Understanding fully the causes of blushing and blooming will prepare you enough for starting the painting process and will make the job easier for you.

Also Read:

All You Need to know about Bituminous Paint
Basic Components of Paint
Causes and Treatments for Algae/mould Growth in Paint
Steps to Check Quality of Painting

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