Structural Concrete Underwater HP

Five Star Marine Structural Concrete Underwater HP is a rapid strength gain, permanent concrete repair material intended for underwater application by hand or trowel. This concrete repair material allows small volume underwater hand placements with minimal washout.  It is designed for placement in tidal zones and underwater where application thickness may range from one-half inch (13 mm) to several inches in a single installation.


  • Rapid set underwater placement
  • Minimal washout
  • Saltwater resistant
  • Chloride and sulfate resistant
  • High three hour strength
  • Variable application thickness


  • Underwater repair of concrete tanks, dams and hydraulic structures
  • Underwater repair of concrete piles, piers, seawalls and marine structures
  • Filling underwater concrete cavities and voids