Sherwin Williams
 
 
 
  Extreme Block Interior/Exterior Stain Blocking Alkyd Primer  
 
Extreme Block Interior/Exterior Stain Blocking Alkyd Primer  
     
Powerful stain-blocking formula keeps stains from bleeding through, reducing the need for repaints  
Dependable adhesion to multiple substrates including wood,drywall, masonry and properly prepared metal  
Fast-drying formula can be topcoated in as little as two hours  
Interior/exterior formula allows for a variety of applications  
Deep penetration ensures lasting adhesion and excellent bonding with both acrylic and alkyd topcoats  
Easily sands to a uniform surface to achieve a smooth finish  
   
 
 
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