MasterEmaco N 423 RS is a fast-setting polymer-modified cementitious repair mortar for horizontal, vertical, or overhead surfaces. 

Product Highlights

  • Polymer modification improves adhesion and provides increased freeze/thaw stability 

  • Non-sag consistency able to be placed in 1" (25 mm) thick lifts 

  • Fast setting 

  • Only requires the addition of potable water 

  • Can be mixed with masteremaco a 400 to increase high-performance properties 


  • Interior and exterior 

  • Vertical and overhead 

  • Horizontal 

  • above and below grade 

  • Spalls or holes in concrete 

  • Deteriorated edges 


  • Concrete

  • Masonry