Product Data Sheet Safety Data Sheet Show all documents
Sikagard®-740 W

Sikagard®-740 W

Silane based reactive water repellent impregnation

Sikagard®-740 W is a one-component low viscosity, reactive impregnation for concrete and cementitious substrates based on concentrated Silane emulsion. Sikagard®-740 W complies with the requirements of EN 1504-2 for hydrophobic Impregnation (penetration depth class I & resistance to freeze and thaw salt stresses)
 

  • Good penetration
  • Economic and easy to use
  • Reduces capillary water absorption, protection against driving rain and splashing on vertical areas
  • Reduction of absorption of aggressive or deleterious agents dissolved in water (i.e. chlorides)
  • No change in water vapour permeability
  • Increases the resistance of concrete to freeze and thaw cycles and de-icing salts
  • Water based emulsion, Low VOC
  • Resistant to sea water
  • Ready to use
Sikagard®-740 W
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Product Data Sheet Safety Data Sheet Show all documents

Usage

Sikagard®-740 W is used as water-repellent impregnation (hydrophobic treatment) for absorbent substrates such as concrete in civil engineering or building concrete structures in both vertical and horizontal traffic area:
  • Suitable for protection against ingress (Principle 1, method 1.1 of EN 1504-9)
  • Suitable for moisture control (Principle 2, method 2.1 of EN 1504-9)
  • Suitable for increasing the resistivity (Principle 8, method 8.1 of EN 1504-9)
 

Advantages

  • Good penetration
  • Economic and easy to use
  • Reduces capillary water absorption, protection against driving rain and splashing on vertical areas
  • Reduction of absorption of aggressive or deleterious agents dissolved in water (i.e. chlorides)
  • No change in water vapour permeability
  • Increases the resistance of concrete to freeze and thaw cycles and de-icing salts
  • Water based emulsion, Low VOC
  • Resistant to sea water
  • Ready to use

Packaging

19 kg (20 l) pail

Colour

Milky water like liquid emulsion.

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • Conformity to the requirements of the EN 1504-2 class I – MPL, Sika Tüffenwies dated July 2009
  • CTL (US) report, April 2009: Scaling resistance (ASTM C 627 / C 672M-03), Rapid Chloride permeability (ASTM C 1202-08), NCHRP Report 244 Series II & IV, AASHTO T 259 & T 260 Chloride penetration.
  • AMEC (Canada), January 2010, Compliance to ALBERTA Infrastructure and transportation specifications
  • Hydrophobic impregnation according to EN 1504-2, DoP 02 03 03 01 002 0 000048 1105; certified by Factory Production Control Body: 0921; certificate 0921-CPD-2050 and provided with the CE-mark
Product Information

Chemical Base

Alkoxysilane

Shelf Life

9 months from date of production if stored in unopened, undamaged and original sealed packaging.

Storage Conditions

Store in dry and cool conditions. Protect from moisture and frost.

Density

~0.950 kg/l (at +25 °C)

Active Content

~40%

Volatile organic compound (VOC) content

< 350 g/lt

(ASTM D 5095 91 / EPA Method 24)
System information

System Structure

2–3 coats applied ”wet on wet”
Technical Information

Resistance to Alkalinity

< 10%

(EN 13580)

Freeze Thaw De-Icing Salt Resistance

Complies

(EN 13581)

Penetration Depth

< 10 mm

Class I

*Test performed on concrete with a W/C = 0.70

Water Absorption

< 7.5%

(EN 13580)

Drying Rate Coefficient

Class I:

>30%

Application

Application Information

Ambient Air Temperature

+5 °C min. / +35 °C max.

Substrate Temperature

+5 °C min. / +35 °C max.

Substrate Moisture Content

<5-6% when measured with Tramex method

Waiting Time / Overcoating

Can be overcoated with water and solvent based polymer paint - contact the proposed paint manufacturer for recommendations.
Sikagard®-740 W can be used as a water repellent primer under many Sikagard® protective coatings. Penetration of water is thus prevented at possible weak spots or in the event of damage to the top coat and the risk of consequential damages such as paint flaking can be reduced.
Waiting time: minimum 5 hours, maximum 1 week.

Curing Treatment

Sikagard®-740 W does not require any special curing but must be protected from rain for at least 6 hours at +20 °C.
Consumption

Consumption

Dependent on absorbency of the substrate as well as the required penetration depth: ~ 100 to 150 g/m2 per coat
Application steps

MIXING

Sikagard®-740 W is supplied ready for use and must not be diluted.

APPLICATION

Sikagard®-740 W is applied using a low-pressure spray, airless spray, brush or roller, in a single pass from bottom up taking care not to let the product run. Apply subsequent pass “wet on wet” until the required consumption is achieved.
On horizontal surface, use flooding technique but avoid excessive ponding on the surface.

CLEANING OF TOOLS

Clean all tools and application equipment with water immediately after use. Hardened / cured material can only be mechanically removed.

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