Product Data Sheet Safety Data Sheet Show all documents

Sika® WT-200 P

Water Resisting and Crystalline Waterproofing Concrete Admixture

Sika® WT-200 P is a combined water resisting and crystalline waterproofing admixture used to reduce the permeability of concrete and to enhance the self-healing abilities of the concrete.

Sika® WT-200 P consists of a mixture of cements, amino alcohols and fillers. These active materials will form non-soluble materials throughout the pore and capillary structure of the concrete and seal the concrete permanently against penetration of water and other liquids. In addition the special formula and ingredients of Sika® WT-200 P enhances the self-healing properties of concrete and will improve the ability to heal cracks in concrete.
Sika® WT-200 P has the following characteristics and benefits:
  • Reduced water penetration under pressure
  • Reduced water absorption
  • Enhancement of self-healing properties of the concrete
  • Improvement in resistance against chemical attack
  • Reduced vapour transmission
Product Data Sheet Safety Data Sheet Show all documents

Usage

Sika® WT-200 P has been specifically formulated to produce high quality waterproof concrete. Sika® WT-200 P treated concrete is used as a part of the Sika® Watertight Concrete System.
Sika® WT-200 P can be used in any below / in / above ground watertight structures such as:
  • Basements
  • Parking garages
  • Utility / plant rooms
  • Tunnels
  • Swimming pools
  • Water retaining structures
  • Dams
  • Waste water treatment structures
  • Underground commercial facilities (malls, transportation hubs etc.)
 

Advantages

Sika® WT-200 P consists of a mixture of cements, amino alcohols and fillers. These active materials will form non-soluble materials throughout the pore and capillary structure of the concrete and seal the concrete permanently against penetration of water and other liquids. In addition the special formula and ingredients of Sika® WT-200 P enhances the self-healing properties of concrete and will improve the ability to heal cracks in concrete.
Sika® WT-200 P has the following characteristics and benefits:
  • Reduced water penetration under pressure
  • Reduced water absorption
  • Enhancement of self-healing properties of the concrete
  • Improvement in resistance against chemical attack
  • Reduced vapour transmission

Packaging

1.75 kg soluble bags
 

Colour

Greyish powder

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Conforms to the requirements of EN 934 – 2, Table 9
Product Information

Chemical Base

Mixture of cements, amino alcohols and fillers

Shelf Life

12 months from date of production if stored in unopened and undamaged original sealed containers.

Storage Conditions

Storage at temperatures between 5 °C and 30 °C. Protect from direct sunlight, moisture, frost and contamination.

 

Bulk Density

~750 kg/m³

pH-Value

~12 (dispersed in water)

Total Chloride Ion Content

< 0.1 M-%

Equivalent Sodium Oxide

≤ 3%
Technical Information

Concreting Guidance

The standard rules of good concreting practice, concerning production and placing, are to be followed.
Laboratory trials shall be carried out before concreting on site, especially when using a new mix design or producing new concrete components.
Fresh concrete must be cured properly and curing applied as early as possible.

Concrete Mix Design

  • For waterproof concrete: Concrete mix design depends on local requirements and / or local standards for watertight concrete systems.
  • For Sika® Watertight Concrete: Sika® WT-200 P has been formulated for use in concrete with a minimum binder content of 350 kg/m³ and a maximum w/b-ratio of 0.45. Depending on the specific mix design the dosage of HRWR/superplasticizer has to be evaluated in order to achieve a S3 / F4 consistence class (EN 206-1).
  • Laboratory trials are always recommended to evaluate and confirm actual water reduction and consistence class.

Effect on Setting

The chemical and physical composition of the components, concrete, Sika® WT-200 P and concrete and ambient temperature can affect the setting time of the concrete.

Application

Application Information

Compatibility

Sika® WT-200 P may be combined with many other Sika products.
Note:
Always conduct trials before combining products in specific mixes and contact Sika technical service for more information and advice.

Dispensing

  • Sika® WT-200 P is added at the time of batching to the concrete.
  • Depending on the operation it is either added to the gauging / mixing water to form a very thin slurry and add it into the concrete mixer.
  • Or add Sika® WT-200 P to the fine and coarse aggregate. The aggregates and Sika® WT-200 P have to be mixed thoroughly for about 120 seconds before adding cement and gauging / mixing water.
  • A wet mixing time, which is depending on the mixing conditions and mixer performance, of at least 60 seconds is recommended.
  • To avoid excess water in the concrete, the final dosage must begin only after 2/3 of the wet mixing time.
  • The w/b-ratio and consistency control remains the responsibility of the concrete producer. Laboratory trials are recommended to evaluate and confirm the actual flowability and workability.

Restrictions

When using of Sika® WT-200 P in combination with SCM the SCM content should be limited to max. 40 % of total binder content. (Fly ash / GGBFS / Silica fume).
Consumption

Recommended Dosage

1–2 % of Sika® WT-200 P by weight of binder

2 x 1.75 kg bag per m3

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