Product Data Sheet Safety Data Sheet Show all documents

Sikagard®-740 W

Silane based reactive water repellent penetrating sealer

Sikagard®-740 W is a one part low viscosity, reactive impregnation for concrete and cementitious substrates based on concentrated Silane emulsion. Sikagard®-740 W complies with the requirements of NCHRP Report 244 Series II & IV. Sikagard®-740 W is classified under the ALBERTA infrastructure and transportation specifications. Sikagard®-740 W complies with the highest requirements of EN 1504-2 for hydrophobic Impregnation (penetration depth class II & resistance to freeze-thaw cycles and chloride ion penetration).

  • 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 vapor 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
Product Data Sheet Safety Data Sheet Show all documents

Usage

Sikagard®-740 W is used as water-repellent penetrating sealer (hydrophobic treatment) for absorbent substrates such as:
  • Walkways and ramps
  • Industrial floors
  • Exposed aggregate
  • Pre-cast or pre-placed concrete
  • Masonry
  • Parking decks
  • Stadiums
  • Bridge Decks
 

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 vapor 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

5 gal. (19 L) pail and 55 gal. (208 L) drum

Color

Milky water like liquid emulsion.

Product Details

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.
Condition material between 40°F and 95°F prior to application

Active Content

~40 %

Product Declaration

Alberta DOT Type 1a

129 ft2/gal.

Alberta DOT Type 1b

Water Repellence

86.3%

Alkali Resistance

85.3%

Vapor Transmission72.3%

NCHRP 224 Series II

125 ft2/gal.

Water Weight Gain

85%

Absorbed Chloride

96%

NCHRP 224 Series IV

125 ft2/gal.

Absorbed Chloride

79.1%
Technical Information

Freeze Thaw De-Icing Salt Resistance

90 Day Salt Ponding

0.0 - 0.5"

93%

0.5 - 1.0"

73%

1.0 - 1.5"74%

Scaling Resistance

None

Penetration Depth

<10 mm

OHD L-34

Application

Application Information

Ambient Air Temperature

40 °F (5 °C) min. / 95 °F (35 °C) max.

Substrate Temperature

40 °F (5 °C) min. / 95 °F (35 °C) max.

Waiting / Recoat Times

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 68 °F (20 °C).
Consumption

Coverage

Coverage is entirely dependent on the porosity of the substrate. Extremely non-porous substrates may only require 1 coat. To ensure proper penetration depth, a field mock up is recommended: ~ 240–380sq.ft/gal
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.

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