MasterTop 115FC is used to finish and smooth fully cured concrete, wood underlayments, linoleum (residential), ceramic tile, and adhesives including cutback. Combined with water, MasterTop 115 FC mixes to a creamy smooth consistency for ease of application. Designed around a Portland cement-based matrix, MasterTop 115 FC is a rapid-setting, aggregate-free, polymer-modified cement-based finishing underlayment. 

Product Features

  • Can be feather-edged

  • Rapid setting minimizing downtime

  • Compatible with most flooring adhesives

  • Primerless

  • Can be mixed with MasterTop A 100 to increase adhesion to embossed material 


  • Skim coating and smoothing rough concrete

  • For filling minor voids, holes, and cracks in concrete and underlayments

  • Leveling and smoothing wood underlayment seams and joints

  • Leveling and filling embossed sheet goods

  • Skim coating over ceramic tile

  • Skim coating over adhesive residue (cutback included) that is thin, well bonded, structurally sound and non-water soluble