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FX-261S Form and Pour Repair Mortar


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FX-261S Form and Pour Repair Mortar is a cementitious, single-component, fiber-reinforced, polymer-modified, silica fume-enhanced, shrinkage-compensated, structural repair mortar with integrated corrosion inhibitor designed with a slower set time for formed applications.

CSI Specification

03 01 00 Maintenance of Concrete

Key Features

  • High slump
  • Long working time
  • Ready to use, simply add potable water
  • Fiber-reinforced
  • High early strength
  • High compressive and flexural strengths
  • High bond strength
  • Excellent freeze/thaw resistance
  • Excellent abrasion resistance
  • Low permeability
  • Extendable with up to 30 lb. (13.6 kg) of coarse aggregate


  • Full- and partial-depth concrete repairs
  • Above-, below- or on-grade applications
  • Formed horizontal, vertical and overhead applications
  • Tunnels, bridges, runways, balconies, parking decks, elevated structures, water treatment facilities, and marine structures
  • Free-flowing repair mortar for hard to reach areas
  • Interior and exterior applications


  • 0.40 ft.3 (0.011 m3) per 50 lb. (22.7 kg) bag, neat


Dark gray

Storage Conditions

Store dry between 40 and 95°F (4–35°C)

Shelf Life

Bags—1 year in unopened packaging
Bulk Bags—6 months in unopened packaging


0 g/L


  • 50 lb. (22.7 kg) bag (FX261S)


  • 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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