Dow 982 Silicone Insulating Glass Sealant

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Description for Dow 982 Silicone Insulating Glass Sealant

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

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

Best Practices for Dow 982 Silicone Insulating Glass Sealant

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Technical Data for Dow 982 Silicone Insulating Glass Sealant

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Overview

Application Type
- Adhesive - Bond
- Sealant - Seal
1 Part or 2 Part
- 2-Part
Material Form
- Liquid - Liquid (Curing Agent)
- Paste - Paste (Base)
Substrate
- Glass
Chemistry
- Silicone
Cure Method
- 2-Part Cure - Base/Curing Agent

Specifications

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

Hardness

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

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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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Spec Engine^® Results
- D94-30P A&B(Dow)
  A two-part, non-slumping, heat-cure liquid silicone rubber elastomer designed to be easily mixed, dispensed, and cured directly on automotive and other industrial components to form a compression gasket.
- Q3-3516 Adhesive Sealant(Dow)
  A fast-setting, high-performance, non-slumping, neutral-cure, RTV silicone rubber that exhibits excellent unprimed adhesion to many substrates.
- 982 NSG Silicone Insulating Glass Sealant(Dow)
  Excellent unprimed adhesion; non-slump; non-corrosive byproducts; long lasting weather tight bond.
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