RUSS-FLO – Flowable fill admixture is a dry powdered material that aids in producing a highly flowable and volume stable flowable fill mixture also known as controlled low strength material (CLSM), controlled density fill (CDF) and low strength mortar (LSM). The use of RUSS-FLO – flowable fill admixture results in improved flowability while reducing the amount of mix water required to obtain a flowable mix.  RUSS-FLO – Flowable fill admixture is packaged in two layer plastic bags.


  • Produces an extremely fluid material that self compacts and places easily
  • Eliminates the costly need to backfill and compact between multiple lifts
  • Generates stable air contents up to 30%
  • Helps control ultimate strength development of CLSM to within specified ranges
  • Results in significant savings of machine and man hours
  • Produces a stable volume with minimal segregation and bleeding
  • Pre-measured dry chemical eliminates concerns of leakage and frozen liquid product
  • Easily dosed on the jobsite
  • Increases yield up to 30% creating material and delivery savings


  • Street and highway cross cuttings
  • Abandoned underground structures
  • Utility excavations
  • Commercial and residential back-fill applications
  • Pipe bedding 
  • Sub-grade base
  • Backfill for radiant heat flatwork 

Technical Data Sheet  MSDS