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Water Stains
 
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Description:
There are yellow or gray or brown discolored areas on painted surfaces.

Cause:
Excessive moisture.

Prevention:
  • Eliminate the source of moisture.
  • Do not use porous acoustic tile in areas subject to moisture (i.e. bathrooms, kitchens, etc.).
  • Provide adequate ventilation (i.e. fans, windows, etc.,) during application.
Cure:
Let the affected area dry. Prime the affected area with an oil-based cover stain product, then apply the desired finish coat.

  
Courtesy of The Rohm and Haas Paint Quality Institute

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