Fritz-pak Corporation

Fill Flow

Category: Specialty


For production of flowable fill or controlled low strength materials.


  • Patented water-soluble Fritz-Pak bag readily breaks down even in very fluid mixes.
  • Easy handling and storage because Fill Flow is a dry powder, not a liquid.
  • No problems with leakage, heat damage, or freezing.
  • Produces an extremely fluid material with minimal shrinkage or segregation.
  • Controlled Low Strength Material (CLSM) can be placed directly from the ready mix truck.
  • Eliminates the need for compaction of layered backfill.
  • Produces very stable air content.
  • Significantly faster and less labor intensive than compacted soil fill.


Fritz-Pak Fill Flow is a dry powdered surfactant packaged in a patented, ready-to-use, water soluble bag. Fill Flow produces controlled low strength material (CLSM), also referred to as flowable fill, controlled density fill (CDF), lean mix backfill, unshrinkable fill and flowable mortar. Fill Flow is environmentally safe and compatible with all conventional CLSM materials.


Fill Flow is compatible with all conventional CLSM materials. Fill Flow contains no calcium chloride or other corrosive agents. Superplasticizers, water reducers and dispersants may reduce the effectiveness of Fill Flow.


  • Item #95669: 1-lb water soluble bag, 24 bags per case, 30 cases per pallet
  • Item #95670: 50-lb paper bag, 40 bags per pallet
Fritz-Pak Corporation NRMCA ACI ASCC ACPA Concrete Pumping