Learn More about Sika WT-240 P

Sika® WT-240 P is a powdered, plant-added crystalline based permeability reducing admixture for use in hydrostatic applications, (PRAH) that reduces the ability of concrete to conduct water flow. It contains moisture activated compounds that produce insoluble crystalline deposits that form within the capillary system. These crystalline formulations have the ability to reduce the size of capillary pores and prevent water penetration. 

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Features & Benefits
  • Up to 85 % reduction in permeability per DIN 1048 testing.
  • Lower construction cost compared to traditional types of membrane waterproofing.
  • Simple one-step use results in reduced application time and faster construction process.
  • Uniform waterproofing throughout the entire concrete volume. 
  • Improved resistance against hydrostatic pressure.
  • Ability to seal concrete cracks up to 0.016in (0.40 mm).
  • Easy application due to repulpable bags.
  • Meets the requirements of ASTM C-494 Type S.
  • NSF/ANSI Standard 61 Certified.
Typical Applications
  • Foundations/Superstructures
  • Water/Wastewater Treatment Plants
  • Bridges and Highways
  • Parking Garages
  • Precast Concrete
  • Shotcrete/Tunneling
  • Commercial and Industrial Facilities
  • Data Centers
  • Marine Structures
  • Swimming Pools

Make Your Application Watertight

Sika® WT-240 P

CRYSTALLINE PERMEABILITY REDUCING ADMIXTURE
Sika® WT-240 P uses a unique combination of active ingredients which react with ingress moisture within concrete. This reaction forms insoluble compounds throughout the capillary system in the concrete matrix resulting in crack healing properties and an improved resistance to water permeability. Additionally, Sika® WT-240 P has minimal impact on set and strength characteristics.   Sika® WT-240 P also provides the following benefits:  
  • Uniform waterproofing throughout the entire concrete volume,
  • Improved resistance against hydrostatic pressure,
  • Ability to seal non-moving concrete cracks up to 0.016 in (0.40 mm),
  • Improved durability and service life,
  • Lower construction costs compared to traditional types of waterproofing,
  • Potentially eliminates the risk of damage to traditional types of waterproofing systems during the construction process.
  In addition to the use of Sika® WT-240 P it is recommended the concrete is designed for a minimum cementitious content of 590 lbs per cubic yard and a maximum water/cementitios ratio of 0.42. For optimum permeability reduction, proper curing of freshly placed concrete per ACI 308R-01 - Guide to Curing Concrete should be followed.   Sika® WT-240 P does not contain intentionally added chlorides.  

How Watertight Concrete Helped Repair the Lincoln Memorial Pool

Lincoln Memorial Pool

In 2010, funds from the American Recovery and Reinvestment Act made the $34 million renovation of the Lincoln Memorial reflecting pool possible. The reflecting pool was slightly redesigned to be shallower and more aesthetically pleasing. Most importantly rehabilitation addressed the water quality and watertightness issues. Thanks in part to the durable products provided by Sika, the Lincoln Memorial reflecting pool will continue to be a treasured national monument for generations to come.

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