Watertight Concrete

The RMX WT is our specialist waterproof concrete; designed using SIKA admixtures to resist water getting in or out depending on the application.

This water resistant concrete is perfect for small projects such as house basements right up to large projects such as dams, tunnels and reservoirs.


This product is suitable for:



  • For use in still and slow flowing water conditions
  • Improved resistance to water infiltration
  • Strength/density can be adjusted
  • Easily pumped or placed direct from the mixer truck
  • Low shrinkage characteristics
  • Complies with NHBC regulations
  • A 15 years warranty can be obtained through Sika® Watertight Concrete System admixture


  • Significant savings of time and labour when directly pumped from the truck
  • Cost effective in comparison with membranes and other systems
  • Industry leading admixture specialist partner for added peace of mind

Reinforcement Options

For increased strength and improved crack resistance we can offer Reinforced Concrete.  Refer to the technical download sheet or contact our team for more information.

Product Video

Product Video

Environmental Solution

RMX WT concrete can incorporate a proportion of GGBS, a cement replacement material that generates a much lower level of embodied CO2 emissions than ordinary cement, minimising environmental impact.

Case Studies

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