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Description for Dow NS Parking Structure Sealant
Good weatherability; resilient; long life reliability; unprimed adhesion; seals irregular surfaces; non-slump.Application Type Bond, Repair, Seal 1 Part or 2 Part 1-Part Material Form Paste Substrate Plastics, Steel, Cement block, Portland cement concrete, Non-porous, 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 for Dow NS Parking Structure Sealant
Overview
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Application Type
- Adhesive - Bond
- Repair & Maintenance - Repair
- Sealant - Seal
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1 Part or 2 Part
- 1-Part
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Material Form
- Paste
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Industry
- Industrial - Loading/material transfer docks
- Construction - Parking lots, Parking structures, Pedestrian bridges, Plazas, Sidewalks, Masonry
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Chemistry
- Silicone - Low-modulus silicone
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Application Method
- Dispenser - Air-powered gun
- Brush - Hand
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Cure Method
- Moisture / Condensation Cure - Moisture
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Color
- Gray
- Red - Brick
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Key Specifications
- ASTM (American Standard Test Method) : C 920 : Class 25 - ASTM C 920, Type S, Grade NS, Class 25, Use T, A, M and O
Specifications
Cure Specs
Cure Temperature (°C) 20 to 25, 25, 25 Test Method Cure Time (min) 20,160 to 30,240, >10,080, >30,240, 20,160 to 30,240 Test Method Viscosity (cPs) Non-sag Tack Free Time (min) 20 to 60 Thixotropic Thixotropic Bond Strength
Peel Strength (piw) 20 (ppi) Test Method Tensile Strength (psi) 100 Test Method Material Resistance
High Temperature Resistance (°C) 149 Low Temperature Resistance (°C) -45 Hardness
Shore A Hardness 15 Test Method Elongation (%) 1,600, >400 Test Method Flexibility Flexible, Resilient Modulus (psi) Low, 40, 15, 20 Test Method Business Information
Shelf Life Details When stored in the original, unopened container at or below 32°C (90°F) Dow Corning NS Parking Structure Sealant has a shelf life of 12 months from date of manufacture. Refer to product packaging for “Use By Date.” Keep containers tightly closed. Shelf Life Type from date of manufacture Shelf Life (mon) 12 Not Good For
Don't Use For transportation for highway pavements, green or partially vulcanized rubber gaskets Don't Use With asphalt-impregnated fiberboard, oil-based caulks -
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Best Practices for Dow NS Parking Structure Sealant
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Surface Preparation
surface must be clean, dry and frost-free at the time of sealant application.
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Application
Dow Corning NS Parking Structure Sealant is not a self-leveling sealant. It must be tooled to ensure good contact and adhesion as well as to control sealant depth and provide a recessed surface. Several devices can be used for tooling. Dow Corning NS Parking Structure Sealant is part of a system that must include the proper backer rod and proper installation procedures. The backer rod must be expanded, closed cell polyethylene foam. Where irregularly shaped joints exist, backer rod that is open-cell with an impervious skin is acceptable to ensure a tight fit against the irregular joint wall faces. Several other back-up materials (paper, fibrous ropes and open-cell foams) are available, but have proven to be unacceptable. There are several manufacturers of closed-cell polyethylene foam and any may be used. When using Dow Corning NS Parking Structure Sealant with other Dow Corning products carrying the Parking Structure Sealant name, please note that these materials are all compatible with one another in either the cured or uncured state, may come in contact with one another, and will bond to one another provided no debris or other contaminants interfere with the bond.
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Cure Temperature Test Methods
Cure Temperature | Cure Time Test Method |
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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 |
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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 |
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 |
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 |
Elongation Test Methods
Elongation | Test Method |
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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 |
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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 |
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15 | ASTM C 661, After 7 days at 25°C (77°F) and 50 percent RH | 25°C |