The 
          key to applying Modern Masters® Metallic Paint with a roller lies 
          in the ability to "back-roll" the finish before it dries. 
          Because of high solids (pigments and binders) content and low VOC (volatile 
          solvent) content in Modern Masters® Metallic Paint, the addition 
          of a slow-drying extender is necessary. Modern Masters® Extender 
          for Rolling gives extra "wet-edge" time, without thinning 
          or compromising the integrity of the Metallic Paint.