• Description for Dow NS Parking Structure Sealant

    Good weatherability; resilient; long life reliability; unprimed adhesion; seals irregular surfaces; non-slump.

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    Application Type Bond, Repair, Seal
    1 Part or 2 Part 1 Part
    Material Form Paste
    Substrate Non-porous, Plastics, Steel, Cement block, Portland cement concrete, Granite, Concrete, Mortar, Paving stone
    Manufacturer Dow
    Chemistry Low-modulus silicone
    Cure Method Moisture
    Cure Temperature (°C) 20 to 25, 25, 25
    Cure Time (min) 20,160 to 30,240, >10,080, >30,240, 20,160 to 30,240
    Viscosity (cPs) Non-sag
    Color Brick, Gray
    High Temperature Resistance (°C) 149
    Low Temperature Resistance (°C) -45
    Key Specifications ASTM (American Standard Test Method): C 920: ASTM C 920, Type S, Grade NS, Class 25, Use T, A, M and O
  • Technical Data

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Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
20 to 25°C
25°C As Cured – After 7 days at 25°C (77°F) and 50 percent RH
25°C As Cured – After 21 days at 25°C (77°F) and 50 percent RH
Cure Time Test Methods
Cure Time Test Method
20,160 to 30,240 min
>10,080 min As Cured – After 7 days at 25°C (77°F) and 50 percent RH
>30,240 min As Cured – After 21 days at 25°C (77°F) and 50 percent RH
20,160 to 30,240 min
Tensile Strength Test Methods
Tensile Strength Cure Time Cure Temperature Cure Humidity Test Method
100 psi 10,080 min 25°C 50 (%) RH ASTM D 412
Peel Strength Test Methods
Peel Strength Cure Time Cure Temperature Cure Humidity Substrate Test Method
20 (ppi) 10,080 min 25°C 50 (%) RH Concrete ASTM C 794
Elongation Test Methods
Elongation Test Method
1,600 % ASTM D 412, After 7 days at 25°C (77°F) and 50 percent RH
>400 % ASTM C 1135, After 21 days at 25°C (77°F) and 50 percent RH, Ultimate Elongation
Modulus Test Methods
Modulus Test Method
Low Modulus Test Method
40 psi ASTM D 412, at 150% elongation, After 7 days at 25°C (77°F) and 50 percent RH
15 psi ASTM C 1135, at 25% elongation, After 21 days at 25°C (77°F) and 50 percent RH
20 psi ASTM C 1135, at 50% elongation, After 21 days at 25°C (77°F) and 50 percent RH
Shore A Hardness Test Methods
Shore A Hardness Shore Hardness Test Method Hardness Temperature
15 ASTM C 661, After 7 days at 25°C (77°F) and 50 percent RH 25°C