Waterproof concrete systems

Hanson Gold Waterproofing System

Gold waterproofing product offering.
Dual approach with Sika proof fully bonded membrane system and joint sealing systems.
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Hanson Silver Waterproofing System

Silver waterproofing product offering.
Watertight concrete with appropriate Sika joint sealing systems.
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Hanson Watertight concrete

A simpler alternative

Compared to traditional methods of achieving watertight structures, Hanson Watertight is a simpler alternative offering contractors, engineers and clients the competitive edge in both cost and time savings.

Utilising the latest admixture technology from admixture partner Sika®, Hanson Watertight gives confidence to all those involved in the project.

Every good quality concrete will allow the passage of water through it as a function of capillarity, when there is water on one side of the structure and air on the other, the volume of capillary pores in the concrete mix is proportional to the water/cement ratio.

A two-step process is used to achieve a watertight concrete:

Step 1: Reduce the water cement ratio, increasing the density of the mix and minimising the size of the pores whilst producing a highly workable concrete to aid placement and compaction.

Step 2: Block the remaining capillary pores ensuring a complete watertight finish.

Where to use it

  • Reservoirs
  • All underground applications
  • Water tanks
  • Dams
  • Sewage treatment works
  • Liquid storage tanks
  • Basements
  • Tunnels
  • Underground car parks
  • Plant rooms
  • Archive storage areas


  • Complies with BS 8102 type B integral waterproofing construction
  • Quality-assured
  • Sustainable
  • Eliminates the use of oil based (polyethylene) and other synthetic products such as membranes
  • Greatly reduces waste on site
  • Reduces vehicle movements to site
  • Is 100% recyclable


  • Keeps water in or out as required
  • Enhanced long term performance including increased durability
  • Reduced risk of reinforcement corrosion
  • Reduces installation time and cost
  • Available as a pumpable or flowing mix

Benefits subject to good concreting practice (placement, finishing and curing).

Sustainable solution

Hanson concrete can incorporate a proportion of Hanson Regen, a cement replacement material that generates a much lower level of embodied CO2 emissions than ordinary cement, minimising environmental impact. Recycled aggregates can also be incorporated subject to local availability and mix design.