Silanes - Sikagard® SN-40

SILANE BASED REACTIVE WATER REPELLENT PENETRATING SEALER

Sikagard® SN-40 is a highly penetrating, water-repelling silane sealer. Using proven technology, the material has been formulated to provide an integral barrier against the ingress of moisture and water-borne salts into concrete and masonry.

• Good penetration
• Solvent based emulsion, good for low temperatures
• 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
• Resistant to sea water
• Ready to use

Usage

• ƒBuilding facades and civil engineering structures. ƒ
• Suitable for use on exposed horizontal and vertical surfaces including bridges and parking decks, barriers, abutment walls and marine structures. ƒ
• Prevention of deterioration arising out of soluble salts and freeze/thaw damage in reinforced concrete and porous block or brickwork. ƒ
• To help prolonging the design or service life of buildings and civil engineering structures.

Advantages

• Good penetration
• Solvent based emulsion, good for low temperatures
• 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
• Resistant to sea water
• Ready to use

Packaging

55 gallon drum

Product Details

Product Information

100% reactive alkylalkoxy silane in
mineral spirits

2 years in original, unopened container

Store between 0 and 85 °F (-18 and 30 °C). Condition material between 50 and 85 °F (10 and 30 °C) prior to use.

6.9 lbs/gal.

102°F

40%

<20 cps

Technical Information

Application

Application Information

Recommended substrate temperatures are between 40-90°F

Material may be applied as low as 20°F, providing the substrate is ice-free/frost-free, though lower penetration might be expected.

Sikagard® SN-40 loses its solvent very rapidly after application. However, the reaction of the residual silane monomer with the substrate will take at least 24 hours at a temperature of 77 °F (25 °C). Drying is considerably longer at colder temperatures. Do not apply if rain is expected within 4-6 hrs of application.

Application Steps

The material is ready for use and requires no mixing. Do not dilute.

Vertical Surfaces: Apply Sikagard® SN-40 using a brush, roller or industrial spray equipment, working from top to bottom by maintaining a 12 in (30 cm) parallel curtain (run down). When applying the material on a vertical surface, avoid accumulation and run-off of the material. In the event of material accumulation or run-off lines being formed, redistribute the material on the surface or remove by sponging. In most cases, the flood coat should be applied in two (2) passes. Apply a light spray to break the surface tension of the wall and follow immediately with a flood coat, “wet on wet”, with the second pass at right angles to the first. Fully saturate all mortar joints.

Horizontal Surfaces: Apply Sikagard® SN-40 using a roller or low-pressure spray, ensuring that product penetrates the substrate and does not “pond” or “puddle” on the surface. If ponding occurs, make sure to redistribute or remove the excess material on the surface before material starts to dry and form a film that will prevent penetration of excess material. Where working on a horizontal surface the flood coat should be applied in two (2) passes, “wet on wet” with the second pass at right angles to the first. Complete and correct coverage of surfaces is crucial to the success of such sealers. Fully saturate all mortar joints.

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