Product Data Sheet Safety Data Sheet Show all documents

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
Product Data Sheet Safety Data Sheet Show all documents

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

Chemical Base

100% reactive alkylalkoxy silane in
mineral spirits

Shelf Life

2 years in original, unopened container

Storage Conditions

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

Density

6.9 lbs/gal.

Flash Point

102°F

Active Content

40%

Viscosity

<20 cps
Technical Information

Resistance to Alkalinity

85.3%

150 ft2/gal

84.2%

225 ft2/gal

Permeability to Water Vapor

90.2%

150 ft2/gal

84.3%

225 ft2/gal

Rapid Chloride Permeability

82%

1 day

87%

5 days

90%

21 days

53.5%

0.625-0.5" depth

Application

Application Information

Substrate Temperature

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.

Waiting / Recoat Times

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.
Consumption

Coverage

The recommended coverage rate for most concrete substrates is 150 ft2/gal. Very porous surfaces may require 2 coats.

Substrate

Coverage

Bridge Decks/Ramps

150-250 ft2/gal

Resealing Bridge Decks/Ramps

150-300 ft2/gal

Smooth Concrete150-225 ft2/gal
Exposed Aggregate100-200 ft2/gal
Concrete Block50-100 ft2/gal
Brick/Stone60-200 ft2/gal

Coverage rates are provided as a guideline only. Many factors including surface texture, porosity and weather conditions will determine actual coverage rates.
Application steps

MIXING

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

APPLICATION

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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