Sika® WT-240 P

CRYSTALLINE PERMEABILITY REDUCING ADMIXTURE

Sika® WT-240 P is an integral powdered crystalline based permeability reducing admixture. Sika® WT-240 P meets the requirements of ASTM C494/AASHTO M 194, Type S and is certified to NSF/ANSI/CAN 61.

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.