Dow Dowsil 7091 Adhesive Sealant

Dow Dowsil 7091 Adhesive Sealant Datasheet
  • Description for Dow Dowsil 7091 Adhesive Sealant

    Alkoxy cure system; non-sag paste consistency; excellent adhesion; cures to a tough, flexible rubber.

    *See Terms of Use Below

    Brand Dowsil
    Application Type Bond, Sealant, Gasketing: Formed-in-Place Gasket (FIPG)
    1 Part or 2 Part 1 Part
    Material Form Paste
    Substrate Ceramic, Glass, Metal, Plastic, Painted steel, Aluminum, Rubber
    Industry Advanced driver-assistance systems (ADAS), E-Mobility Solutions, Airbag, Powertrain, Power Tools, Smart Home Devices, Headlamp assemblies
    Manufacturer Dow
    Chemistry Silicone
    Application Method Spatula
    Cure Method Moisture, Alkoxy cure system
    Cure Temperature (°C) 20 to 25, 23, 20 to 25
    Cure Time (min) 10,080, 1,440
    Viscosity (cPs) Non-sag, Non-slump
    Color Black, Gray, White
    High Temperature Resistance (°C) 180
    Low Temperature Resistance (°C) -40
    Durability Tough
  • Technical Data for Dow Dowsil 7091 Adhesive Sealant

    Overview
    • Application Type
      • Gasketing: Formed-in-Place Gaskets - Formed-in-Place Gasket (FIPG)
      • Adhesive - Bond
      • Sealant
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 1 Part
    • Material Form
      • Paste
    • Substrate
    • Industry
      • Control Module
      • Advanced driver-assistance systems (ADAS)
      • E-Mobility Solutions
      • Airbag
      • Powertrain
      • Headlamp - Headlamp assemblies
      • Smart Home Devices
      • Industrial - Engineering applications
      • Power Tools
    • Chemistry
    • Application Method
      • Spatula/Trowel - Spatula
    • Cure Method
      • Moisture / Condensation Cure - Moisture
      • Other - Alkoxy cure system
    • Color
      • Black
      • Gray
      • White
    • Brand
      • Dowsil
    Specifications
    Cure Specs
    Cure Temperature (°C) 20 to 25, 23, 20 to 25 Test Method
    Cure Time (min) 10,080, 1,440 Test Method
    Viscosity (cPs) Non-sag, Non-slump
    Tack Free Time (min) 28, 30 Test Method
    Work / Pot Time (min) 15, 10 to 15 Test Method
    Thixotropic Thixotropic
    Bond Strength
    General Bond Strength (psi) Excellent
    Tear Strength (piw) 15 (kN/m) Test Method
    Tensile Strength (psi) 2.5 (Mpa) Test Method
    Material Resistance
    High Temperature Resistance (°C) 180
    Low Temperature Resistance (°C) -40
    Hardness
    Durability Tough
    Shore A Hardness 32 Test Method
    Elongation (%) 680 Test Method
    Flexibility Flexible
    Other Properties
    Specific Gravity 1.400 Test Method
    Business Information
    Shelf Life Details When stored at or below 30°C (86°F) in the original unopened containers, this product has a usable life of 12 months from the date of production.
    Shelf Life Type From the date of production
    Shelf Life (mon) 12
    Not Good For
    Don't Use With Low-energy plastics, Polyethylene, polypropylene, PTFE, Bad Substrates
  • Best Practices for Dow Dowsil 7091 Adhesive Sealant

    *See Terms of Use Below

    1. Surface Preparation

      All surfaces must be clean and dry. Degrease and wash off any contaminants that could impair adhesion. Suitable solvents include isopropyl alcohol, acetone or methyl ethyl ketone.

      Good unprimed adhesion may be obtained on a variety of substrates, including enamelled and painted steel, aluminum, ceramic, glass and certain plastics. Substrates to which good adhesion is normally not obtained include PTFE, polyethylene, polypropylene and related materials.

      For maximum adhesion, the use of Dow Corning® 1200 OS Primer is recommended. After solvent cleaning apply a thin coat of Dow Corning 1200 OS Primer by dipping, brushing or spraying. Allow primer to dry for 15 to 90 minutes at room temperature and a relative humidity of 50% or higher.

    2. Application

      Apply a bead of Dow Corning® 7091 Adhesive/Sealant (see Handling Precautions) to one of the prepared surfaces, then quickly cover with the other substrate to be bonded.

      On exposure to moisture, the freshly applied material will "skin-over" in about 10-15 minutes at room temperature and 50% relative humidity. Any tooling should be completed before this skin forms. The surface is easily tooled with a spatula. The adhesive/sealant will be tack-free in approximately 30 minutes.

      Easy to apply

    3. Curing

      After skin formation, cure continues inward from the surface. In 24 hours (at room temperature and 50% relative humidity) Dow Corning 7091 Adhesive/Sealant will cure to a depth of about 2mm. Very deep sections, especially when access to atmospheric moisture is restricted, will take longer to cure completely. Cure time is extended at lower humidity levels. Before handling and packaging bonded components, users are advised to wait a sufficiently long time to ensure that the integrity of the adhesive seal is not affected. This will depend on many factors and should be determined by the user for each specific application.

    4. Testing

      Adhesion may be less successful on low-energy plastics such as Polyethylene, Polypropylene and PTFE. Users should do preliminary tests in each specific application to ensure satisfactory results.

  • Comparable Materials for Dow Dowsil 7091 Adhesive Sealant

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Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
20 to 25°C When exposed to moisture in the air
23°C Cured 7 days in air at 23°C (73°F) and 50% relative humidity
20 to 25°C 50% relative humidity
Cure Time Test Methods
Cure Time Test Method
10,080 min Cured 7 days in air at 23°C (73°F) and 50% relative humidity
1,440 min 50% relative humidity
Tack Free Time Test Methods
Tack Free Time Test Method
28 min CTM 0095, ASTM MIL-S-8802E, Tack-free time is the time required for the product to develop a non-tacky surface based on adhesion to a polyethylene film.
30 min
Work / Pot Time Test Methods
Work / Pot Time Test Method Temperature
15 min CTM 0098
10 to 15 min 50% relative humidity 20 to 25°C
Tensile Strength Test Methods
Tensile Strength Cure Time Cure Temperature Cure Humidity Test Method
2.5 (Mpa) 10,080 min 23°C 50 % CTM 0137A, ASTM D 412
Tear Strength Test Methods
Tear Strength Cure Time Cure Temperature Cure Humidity Test Method
15 (kN/m) 10,080 min 23°C 50 % CTM 0137 A, ASTM D 412, Die B
Elongation Test Methods
Elongation Test Method
680 % CTM 0137A, ASTM D412, cured 7 days in air at 23°C (73°F) and 50% relative humidity, At break
Shore A Hardness Test Methods
Shore A Hardness Shore Hardness Test Method Hardness Temperature
32 CTM 0099, ASTM D2240, cured 7 days in air at 23°C (73°F) and 50% relative humidity, Durometer 23°C
Specific Gravity Test Methods
Specific Gravity Temperature Test Method
1.400 22°C CTM 0022, ASTM D0792, cured 7 days in air at 23°C (73°F) and 50% relative humidity