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FX-225 Non-Shrink Underwater Grout


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Cementitious Concrete Repair Products

This product's information may differ depending on the category of use. You are currently viewing details related to Cementitious Concrete Repair Products. You can also view product information related to the categories of: FX-70® Structural Piling Repair and Protection System, Cement-Based Repairs

FX-225 Non-Shrink Underwater Grout is a high-strength, non-metallic, non-segregating grout designed with special anti-washout admixtures, corrosion inhibitors and polymers. FX-225 can be pumped or tremied underwater to grout FX-70® fiberglass pile jackets and as a structural repair mortar for formed applications above and below water without dewatering.

CSI Specification

03 01 00 Maintenance of Concrete

Key Features

  • Flowable and pumpable
  • No dewatering or cofferdams required
  • Shrinkage compensated
  • Bonds well to concrete
  • May be extended with clean, washed nominal 3/8 in. (9 mm) pea gravel
  • Ready to use—simply add potable water
  • Suitable for saltwater marine applications


  • Concrete repairs in marine structures
  • Underwater grouting applications
  • Pile jacket repairs with the FX‑70 structural pile repair and protection system
  • Seawall repairs without dewatering
  • Form and pour repairs above water


  • 0.47 ft.3 (0.013 m3) per 55 lb. (24.9 kg) bag
  • 0.64 ft.3 (0.018 m3) per 55 lb. (24.9 kg) bag extended with 30 lb. (13.6 kg) of pea gravel

Storage Conditions

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

Shelf Life

  • 1 year in unopened packaging


  • 0 g/L


  • 55 lb. (24.9 kg) bag (FX225)
  • 2,500 lb. (1134 kg) bulk bag (FX225-B2500)

Limited Warranty

  • 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

Related Literature

Code Reports & Compliance