Watertight Concrete

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Roadstone Watertight Concrete mix is a key component to any waterproofed concrete structure. Using integral water resisting concrete admixtures that are added at the batching stage, a highly impermeable concrete is produced with low water absorption, increased crack resistance and significantly reduced drying shrinkage. The passage of water (as well as chlorides and sulphates) is significantly reduced by the pore blocking nature of the system, resulting in a much greater degree of durability and imperviousness in the concrete. Additionally the placing and compacting of the concrete is also enhanced with the provision of an S3 consistence class.


  • Water retaining structures
  •  Basements
  • Lift shafts
  • Swimming pools
  • Underground car parks
  • Tunnels
  • Watertight Concrete

Key features and benefits

  • Watertight Construction (keeps water out/in)
  • Reduces shrinkage of concrete
  • Increased durability
  • Prevents corrosion of reinforcement
  • No impact on setting time
  • Can be used and place like normal concrete

Technical specification

  • I.S. EN 206 – Concrete Part 1 : Specification, Performance, Production and Conformity
  • I.S. EN 1992 : Part 3 – Design of concrete structures for retaining aqueous liquids
  • Project Specific Specifications

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