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FX Rapid-Setting Mortar Rapid-Hardening Cement-Based Mortar

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FX Rapid-Setting Mortar is a single-component, rapid-hardening cement-based mortar with corrosion inhibitors designed for horizontal and formed vertical repairs where a quick turnaround with minimal downtime is required. It is a versatile formulation that can be used neat or extended with coarse aggregate for economical repairs.

CSI Specification

03 01 00 Maintenance of Concrete

Key Features

  • Ready to use, simply add potable water
  • High early strength
  • Shrinkage compensated
  • Freeze/thaw resistant
  • Provides fast turnaround
  • May be extended with up to 50 lb. (22.7 kg) of clean, washed nominal 3/8″ in. (9 mm) pea gravel


  • Partial and full-depth concrete repairs
  • On-grade or below-grade repairs
  • Horizontal and formed vertical applications


  • 0.40 ft.³ (0.011 m³) per 50 lb. (22.7 kg)
  • 0.68 ft.³ (0.019 m³) per 50 lb. (22.7 kg) bag extended with 50 lb. (22.7 kg) of pea gravel

Shelf Life

  • 1 year in unopened packaging


  • 0 g/L


  • 50 lb. bag 22.7k (FXRAPID)
  • 2,500 lb. bulk bag (FXRAPID-B2500)


  • This product is covered by the Simpson Strong-Tie RPS Product One-Year Limited Warranty, which is available at strongtie.com/limited-warranties or by calling Simpson Strong-Tie at (800) 999-5099
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