NBS Source


A combined water resisting and crystalline waterproofing admixture used to reduce permeability of concrete and has the ability to heal cracks. 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 enhances the self-healing properties of concrete.


  • 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.


Specifically formulated to produce high quality waterproof concrete. Treated concrete is used as a part of the Sika® Watertight Concrete System.

Can be used in any below, in or above ground watertight structures such as:

  • Basements.
  • Parking garages.
  • Utility or plant rooms.
  • Tunnels.
  • Swimming pools.
  • Water retaining structures.
  • Dams.
  • Waste water treatment structures.
  • Underground commercial facilities (shopping centres, transportation hubs, etc).

Conforms to the requirements of BS EN 934-2 Table 9, DoP 02 14 03 01 100 0 000094 1088, certified by Factory Production Control Body 0086, Certificate 541325, and CE marked.

General information

Uniclass 2015

Pr_20_31_03_96 Waterproofing mortar admixturesPrimary


E10/418 Proprietary admixture

E11/435 Proprietary admixture

Product range

Concrete Admixtures

Specification data - Waterproofing mortar admixtures

Product Reference

Sika®WT-200 P

Standard product features


Powder (mixture of cements, amino alcohols and fillers).


Greyish powder.

Bulk density:

750 kg/m³ ± 50.

pH value:

12 ± 1.0.

Water soluble chloride content:

< 0.1 M-%.

Alkali content:

≤ 3%.

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Sika® 1+ Water Resisting Concrete Admixture

Sika® 1+ Water Resisting Concrete Admixture