MasterSet® R 100 (Formerly POZZOLITH 100 XR) 

MasterSet R 100 ready-to-use, liquid admixture is used for producing more uniform and predictable quality concrete. Placing and finishing requirements are facilitated because this admixture retards setting time. MasterSet R 100 admixture meets ASTM C 494/C 494M requirements for Type B, retarding, and Type D, water-reducing and retarding, admixtures.   


  • Reduced water content required for a given workability
  • Retarded setting characteristics
  • Controlled retardation – depending on the addition rate
  • Full-form deflection can take place (before concrete sets) in extended pours for bridge decks, contilevers, nonshored structural elements, etc. 


  • Improved workability
  • Reduced segregation
  • Superior finishing characteristics for flatwork and cast surfaces
  • Flexibility in scheduling of placing and finishing operations
  • Offsets effects of too early stiffening during extended delays between mixing and placing
  • Helps eliminate cold joints
  • Peak temperature and/or rate of temperature rise in mass concrete lowered thereby reducing thermal cracking
  • Increased compressive and flexural strength


U.S. and Canadian Product Information:












POZZOLITH 100 XR became MasterSet R 100 under the Master Builders Solutions brand, effective January 15, 2014.
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