Dow 982 Silicone Insulating Glass Sealant

Dow 982 Silicone Insulating Glass Sealant Datasheet
  • Description for Dow 982 Silicone Insulating Glass Sealant

    Excellent unprimed adhesion; non-slump; non-corrosive byproducts; long lasting weather tight bond.

    *See Terms of Use Below

    Application Type Bond, Seal
    1 Part or 2 Part 2 Part
    Material Form Liquid (Curing Agent), Paste (Base)
    Substrate Glass
    Manufacturer Dow
    Chemistry Silicone
    Cure Method Base/Curing Agent
    Cure Temperature (°C) 25
    Cure Time (min) 10,080
    Viscosity (cPs) Non-slump, Pourable
  • Technical Data for Dow 982 Silicone Insulating Glass Sealant

    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 2 Part
    • Material Form
      • Liquid - Liquid (Curing Agent)
      • Paste - Paste (Base)
    • Substrate
    • Chemistry
    • Cure Method
      • 2-Part Cure - Base/Curing Agent
    Cure Specs
    Cure Temperature (°C) 25 Test Method
    Cure Time (min) 10,080 Test Method
    Viscosity (cPs) Non-slump, Pourable
    Work / Pot Time (min) 20 to 40 Test Method
    Mix Ratio 9:1 (by volume)
    Bond Strength
    Tensile Strength (psi) 228 Test Method
    Material Resistance
    Environmental Resistance Environmental resistance
    Shore A Hardness 43 Test Method
    Elongation (%) 2 Test Method
    Flexibility Flexible
    Modulus (psi) High
    Other Properties
    Specific Gravity 1.380, 1.020, 1.220 Test Method
    Flash Point (°F) 109.4
    Business Information
    Shelf Life Details When stored in closed, airtight containers at or below 27°C (80°F), Dow Corning 982 Silicone Insulating Glass Sealant–Base and Dow Corning 2-Part Curing Agent will have a shelf life of 12 months from date of manufacture. Refer to product packaging for “Use By” date.
    Shelf Life Type From date of manufacture
    Shelf Life (mon) 12
    Not Good For
    Don't Use For green or partially vulcanized rubber gaskets and tapes
    Don't Use With impregnated wood, oil-based caulks
  • Best Practices for Dow 982 Silicone Insulating Glass Sealant

    *See Terms of Use Below

    1. Surface Preparation

      Before using this product, clean all surfaces, removing all foreign matter and contaminants, such as grease, oil, dust, water, frost, surface dirt, old sealants or glazing compounds and protective coatings. Clean all metal, glass and plastic surfaces by mechanical or solvent procedures. Always wipe solvents on and off with clean, oil- and lint-free cloths.

      Follow solvent manufacturer’s recommended safe handling instructions and applicable federal, state and local laws.

    2. Mixing

      To obtain ultimate physical properties, Dow Corning 982 Silicone Insulating Glass Sealant–Base and Dow Corning 2-Part Curing Agent should be thoroughly mixed using an airless mixing system. Dow Corning 982 Silicone Insulating Glass Sealant is compatible with existing commercial two-part silicone dispensing equipment. Neither hand mixing nor mechanical mixing is satisfactory due to incorporation of air resulting in altered physical properties. Dow Corning 982 Silicone Insulating Glass Sealant is supplied as two separate components. As a custom feature for the customer, the cure rate may be adjusted by changing the base to- curing agent mix ratio from 9:1 to 10.5:1 by volume. Sealant physical properties are not significantly changed over this range. Changes in the temperature and humidity of the environment, however, will affect snap time. See Table I for ratio weight volumetric equivalents. Because of its reactivity with atmospheric moisture, Dow Corning 2-Part Curing Agent should not be exposed to air for prolonged periods. During shutdown of mixing equipment, dispensing and mixing lines should be purged with uncatalyzed base to minimize sealant buildup. Lot matching of Dow Corning 982 Silicone Insulating Glass Sealant–Base and Dow Corning 2-Part Curing Agent is NOT required.

    3. Testing

      Dow Corning recommends several in-house quality control tests to ensure optimum sealant performance. These tests include: Butterfly test to ensure proper mix.

      Snap time or cure test to ensure expected sealant cure rate at proper mix ratio.

      Tab adhesion test to ensure proper sealant adhesion to production surfaces These tests should be performed every time lots of base or curing agent are changed, or every time the production line is started. Specific procedures for these recommended tests can be supplied by Dow Corning.

  • Comparable Materials for Dow 982 Silicone Insulating Glass Sealant

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Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
25°C 50 percent Relative Humidity
Cure Time Test Methods
Cure Time Test Method
10,080 min 50 percent Relative Humidity
Work / Pot Time Test Methods
Work / Pot Time Test Method
20 to 40 min CTM 0092
Tensile Strength Test Methods
Tensile Strength Cure Time Cure Temperature Cure Humidity Test Method
228 psi 10,080 min 25°C 50 % ASTM D 412, 7 Days at 50 percent RH and 25°C (77°F)
Elongation Test Methods
Elongation Test Method
2 % ASTM D 412
Shore A Hardness Test Methods
Shore A Hardness Shore Hardness Test Method Hardness Temperature
43 ASTM C 661, 7 Days at 25°C (77°F) and 50 percent Relative Humidity 25°C
Specific Gravity Test Methods
Specific Gravity Test Method
1.380 CTM 0097
1.020 CTM 0097
1.220 CTM 0097