Silane Siloxane Coating - 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
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 BaseAlkoxysilane
Shelf Life9 months from date of production if stored in unopened, undamaged and original sealed packaging.
Storage ConditionsStore in dry and cool conditions. Protect from moisture and frost.
Condition material between 40°F and 95°F prior to application
Active Content~40 %
Technical Information
Application
Application Information
Ambient Air Temperature40 °F (5 °C) min. / 95 °F (35 °C) max.
Substrate Temperature40 °F (5 °C) min. / 95 °F (35 °C) max.
Waiting / Recoat TimesCan 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 TreatmentSikagard®-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
CoverageCoverage 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
MIXINGSikagard®-740 W is supplied ready for use and must not be diluted.
APPLICATIONSikagard®-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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