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65lb Unit

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Sikacrete 321 FS | One-component, cementitious, pourable, rapid hardening concrete mix


Product Data Sheet



Sikacrete® 321 FS is a one-component, portland-cement concrete containing factory blended coarse aggregate designed for quick turnaround patching and overlay needs.

Where to Use

  • As a structural repair material for bridges, parking facilities, industrial plants and walkways
  • On horizontal, vertical and overhead surfaces (formed)
  • On grade, above, and below grade on concrete
  • Full depth repairs
  • Filler for voids and cavities


  • Complies with ASTM C-928 specifications for very rapid and rapid hardening mortars
  • Very rapid setting structures can be opened to vehicular traffic in 2 hours
  • Non-gypsum based with volume stability
  • Compatible with coefficient of thermal expansion of concrete
  • Increased resistance to deicing salts
  • Easily applied to clean, sound substrate
  • Not a vapor barrier
  • Excellent resistance to freeze/thaw with outstanding durability
  • Pre-packaged coarse aggregate: Eliminates need to extend material in the field;
  • Eliminates the risk of reactive aggregate
  • Formulated to compensate for shrinkage


  • Approximately 0.50 ft.3/unit. Actual yield on site may vary due to surface profile, waste, and other factors.


  • 65 lb. multi-wall bag; bulk bag available on request


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