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MasterCell® 25 (Formerly RHEOCELL Rheofill) 

MasterCell 25 admixture is a ready-to-use, self-contained product for use in various flowable fill applications where reduced densities (unit weights) and air contents of up to 35% are desired.


MasterCell 25 admixture produced CLSM can be used in any application in lieu of compacted soil. MasterCell admixture is used in flowable fill mixes to lower the density (unit weight), eliminate settlement, and to control strength development. It produces stable air contents of 15-35% and reduces water content by as much as 50%.


  • Increased yield
  • Optimum workability – can be produced in either fluid or plastic consistency
  • Increased pumpability
  • Little or no bleeding
  • No segregation
  • Reduced shrinkage
  • Reduced settlement
  • Control of strength development
  • Cost-effective compared to in-pace cost of compacted soil

U.S. and Canadian Product Information:

Rheocell Rheofill became MasterCell 25 under the Master Builders Solutions brand, effective January 15, 2014.
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