Product Data Sheet
Edition 23/04/2004
Identification no:111
Version no. 01
Sikagard® 703 W (Provisional)
Sikagard® 703 W (Provisional)
Water based Silane / Siloxane water repellent
Sikagard 703 W is a ready to use silane / siloxane based penetrating water repellent.
Uses Sikagard 703 W is used to create a water repellent protective impregnation on substrates made of concrete, mortar, masonry, brick, stone, and asbestos-cement.
Characteristics / Advantages
  • Water based with strong water-repellent capacity
  • Improves the façade’s resistance to the ingress of water.
  • Allows the substrate to breath, it protects construction materials from wind driven rain
  • Treatment is invisible and does not change the substrate aesthetics
  • Improves the resistance to dirt, and reduces the bonding of fungi, lichens
  • Does not alter the substrate porosity
  • Can be coated with various paint
Approval / Standards PV VERITAS n° GEN 1/010361 D /01 and n° GEN 1/010361 D /02 aging, permeability, water absorption.
Product Data
Appearance / Colour Liquid Milky White
Packaging 5 litre containers
Storage Conditions Shelf-Life Store in a dry area between 5°C and 40°C. Protect from direct sunlight.
One year in original, unopened container.
Technical Data  
Chemical Base Water based silane / siloxane
Density 0.933 g/cm³
pH-Value 8 - 10
System Information  
System Structure 2 – 3 coats
Application Details  
Consumption / Dosage Depends on substrate porosity:

On concrete and mortar: 4 – 5 m²/litre/coat

On porous materials: between 2 – 3 m²/litre depending on the porosity (a preliminary test is necessary to determine the exact consumption)
Substrate Quality Clean, sound & dry.
Substrate Preparation / Priming All surfaces must be clean, sound and properly cured. Remove all loose materials mechanically, with a wire brush, or by water or sand blasting.

The substrate need not be completely dry. While residual moisture does not affect Sikagard 703 W, the drier the substrate the better the penetration and subsequent protection.
Application Conditions / Limits  
Substrate Temperature Min. 5°C – max. 30°C.
Ambient Temperature Min. 5°C – max. 35°C.
Substrate Humidity < 10%
Relative Air Humidity 80%
Dew Point Substrate temperature must always be at least 3°C above the measured dew point.
Application Instructions  
Application Method / Tools Sikagard 703 W is supplied ready for use. Sikagard 703 W is applied in even layers from the bottom upward taking care not to let the product run. Apply Sikagard 703 W evenly and liberally by spray, roller or brush. A preliminary site test application is recommended to determine effective coverage and performance.

When spraying, it is advisable to use hand-pressure equipment, such as a knapsack sprayer, rather than compressed air driven.

Optimum effectiveness is reached after a few days.
Application Details    
Light wear
0.3 –0.6 mm
1x Sikafloor®-400N
0.2 –0.4 kg/m2
1x Sikafloor®-400N
0.4 –0.8 kg/m2
Medium wear
0.5 –1.1 mm
1x Sikafloor®-400N
0.2 –0.4 kg/m2
2x Sikafloor®-400N
0.4 –0.8 kg/m2
1x Sikafloor®-410
0.15 kg/m2
Medium wear +
Surface Design
0.5 –2.0 mm
1x Sikafloor®-400N
0.2 –0.4 kg/m2
2x Sikafloor®-400N
0.4–0.8 kg/m2
Second application
sprinkled with
0.03 –0.07 kg/m2
1x Sikafloor®-410
0.15 kg/m2
High wear
1.5 –2.0 mm
1x Sikafloor®-156
0.4–0.6 kg/m2
broadcasted in excess
with quartz sand 0.3-0.8
mm 2.5 –3.0 kg/m2
2x Sikafloor®-400N
0.6 –0.8 kg/m2
1x Sikafloor®-410
0.15 kg/m2
Substrate Quality The cementitious substrate should be sound and of sufficient strength
(min. 25 N/mm²).

Minimum pull-off strength 1.5 N/mm².

Free from grease, oil and contaminants.

On young concrete slabs, cementitious screeds or damp substrates ( > 4% moisture) use Sikafloor®-EpoCem.
Substrate Preparation All dust, loose and friable materials and glaze or varnish of tiles must be completely removed by mechanical means.

Existing coatings have to be inspected, cleaned and mechanically ground to achieve a sound, gripping substrate.

In case of bad adhesion to the substrate, existing coatings have to be removed.
Cleaning of Tools Use Kwiklean water-soluble solvent to clean all application tools immediately after use.
Notes on Application / Limits Do not use on natural stone without prior testing.

Not intended for waterproofing under hydrostatic pressure.

The substrate can be slightly damp.

All cement based substrates (mortar, concrete) must be at least 7 days old

The surface must be clean and free of lichens and fungi Protect glass surfaces and aluminium frames.

Protect from rain until dry.

The water-repellents effect is not as effective on horizontal surfaces subject to ponding.

Water-repellence is reduced significantly when the substrate is heavily cracked Do not allow to go down drains, waterways, or into the soil.
Local Restrictions Please note that as a result of specific local regulations the performances of this product may vary from country to country. Please consult the local Product Data Sheet for the exact description of the application fields.
Health and Safety Information  
Skin Contact Wash thoroughly with soap and water.
Respiratory Problems Remove affected person to fresh air immediately and contact physician.
Eye Contact Flush immediately with water for 10 - 15 minutes and contact a physician immediately.
Health Precautions Product is water based. Exercise care, as with handling any chemical construction product.
Safety Precaution Use adequate ventilation. Safety goggles and chemical resistant gloves are recommended. Remove contaminated clothing immediately.
Spills Collect with absorbent material. Uncured material may be removed with clean water.



Contact Sika for further health and safety information. Material safety data sheets and Road Transport Emergency Cards are available on request.
Protective Measures To avoid rare allergic reactions, we recommend the use of rubber gloves. Change soiled work clothes and wash hands before breaks and after finishing work. Local regulations as well as health and safety advice on packaging labels must be observed.
Important Notes Residues of materials must be removed according to local regulations. Fully cured material can be disposed of as household waste under agreement with the responsible local authorities. Detailed health and safety information as well detailed precautionary measures e.g. physical, toxicological and ecological data can be obtained from the safety data sheet.
Legal Notes The information, and, in particular, the recommendations relating to the application and end-use of SikaŽ products, are given in good faith based on Sika's current knowledge and experience of the products when properly stored, handled and applied under normal conditions. In practice, the differences in materials, substrates and actual site conditions are such that no warranty in respect of merchantability or of fitness for a particular purpose, nor any liability arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written recommendations, or from any other advice offered. The proprietary rights of third parties must be observed. All orders are accepted subject to our current terms of sale and delivery. Users should always refer to the most recent issue of the Product Data Sheet for the product concerned, copies of which will be supplied on request or can be accessed on the internet under
Sika South Africa (Pty) Ltd E-Mail:
9 Hocking Place, Phone +27 31 792 6500
Westmead, 3608 Telefax +27 31 700 1760
South Africa