MasterFlow 928: High-precision mineral-aggregate grout with extended working time

Formerly: Masterflow 928 Grout

How does MasterFlow 928 work?

MasterFlow 928 grout is a hydraulic cement-based mineral aggregate non-shrink grout with extended working time. It is ideally suited for grouting machines or plates requiring precision load-bearing support. It can be placed from fluid to damp pack over a temperature range of 45 to 90° F (7 to 32° C).

Recommended uses:

  • Grouting of equipment, such as compressors and generators, pump bases and drive motors, tank bases, conveyors, etc.
  • Grouting anchor bolts, rebar and dowel rods
  • Grouting of precast wall panels, beams, columns, curtain walls, concrete systems and other structural and non-structural building components
  • Repairing concrete, including grouting voids and rock pockets

What are the unique features of MasterFlow 928?

  • Meets the requirements of ASTM C1107 and US Army Corps of Engineers CRD C621 (Grades B and C), at a fluid consistency over a 30-minute working time
  • NSF/ANSI Standard 61 certified for use with potable water
  • Pumpable
  • Can be mixed at a wide range of consistencies
  • Sulfate-resistant for marine, wastewater and other sulfate-containing environments

What are the benefits of MasterFlow 928?

  • Extended working time
  • Freeze/thaw resistant making it suitable for exterior applications
  • Hardens free of bleeding, segregation, or settlement shrinkage to provide maximum effective bearing area for optimum load transfer
  • Contains high-quality, well-graded quartz aggregate for optimum strength and workability

US / Canada Product Information

Data Guide

French Data Guide

Spanish Data Guide

Certification Letter

Guide Spec

LEED Letter

LEED v4 Letter

Direct contact

Master Builders Solutions Technical Support

Construction Systems


Safety Data Sheet (SDS)

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Related Literature

Certification Letter

pdf (77.17 Kb)

Data Guide

pdf (99.44 Kb)

Data Guide (French)

pdf (294.08 Kb)

Data Guide (Spanish)

pdf (165.66 Kb)

Guide Specs

doc (156.50 Kb)

Installation Guide

pdf (224.18 Kb)

LEED Letter

pdf (108.40 Kb)

LEED v4 Letter

pdf (69.11 Kb)


docx (124.00 Kb)

zip (56.73 Kb)