Rockbond Underwater Admix 2201 (RB UWA2201)

Product Information Sheet:

ROCKBOND UNDERWATER ADMIX 2201 (RB UWA2201) powder is a blend of admixtures which has been specially formulated to mix and produce high strength underwater grouts and concretes. The powder contains a system of anti washout agents, water reducing agents, stability aids to prevent segregation under pressure, and a compressive strength enhancer. The powder is ready to use, supplied to order, packaged in moisture proof, durable bags and has a shelf life of five years.

Special Properties

  • The complete admixture for underwater flowing materials.
  • Can be packaged in water soluble bags for convenient handling.
  • Minimises “fog” or dispersion when poured and placed underwater.
  • Extremely stable, and will not breakdown, segregate or bleed.
  • Readily pumpable, and stable under pressure.
  • Will not retard at higher dosages.
  • Contains no deleterious substances harmful to aquatic life.
  • High yielding, economical, non flammable, non toxic, odour free, user friendly and safe to use.


  • To produce quality underwater grouts and flowing concretes from site batched materials.
  • For use in ready mixed concrete for flowing underwater applications.
  • To produce cementitious materials that are washout resistant when brought into contact with water or running water.
  • To produce cohesive, mobile, and free flowing underwater materials that are self levelling and self compacting.
  • To produce high strength concrete to prevent abrasion from mechanical attack and scour.
  • To produce chemically resistant, durable marine grouts and concretes.
  • Freshwater and seawater concrete repair and protection.
  • For use in concrete for underwater void filling of seawalls, piles, harbours, quays and jetties.
  • For use in flowing cementitious materials for concrete repair and protection, and the consolidation of water retaining structures, dams, pillars and piers.
  • Materials for waterlogged foundations, anchorages, pilings, conduits, pipes and sewers.